diff --git a/include/ImageManager.h b/include/ImageManager.h
index 6fcc6012ba..117178a7fd 100644
--- a/include/ImageManager.h
+++ b/include/ImageManager.h
@@ -113,10 +113,12 @@ public:
 
     /**
      *  Enables the image
+     *    @param iid Image id
      *    @param to_enable true will enable the image.
+     *    @param error_str Error reason, if any
      *    @return 0 on success
      */
-    int enable_image(int iid, bool to_enable);
+    int enable_image(int iid, bool to_enable, string& error_str);
 
     /**
      *  Adds a new image to the repository copying or creating it as needed
@@ -155,9 +157,10 @@ public:
     /**
      *  Deletes an image from the repository and the DB
      *    @param iid id of image
+     *    @param error_str Error reason, if any
      *    @return 0 on success
      */
-    int delete_image(int iid, const string& ds_data);
+    int delete_image(int iid, const string& ds_data, string& error_str);
 
     /**
      *  Gets the size of an image by calling the STAT action of the associated
diff --git a/src/image/ImageManagerActions.cc b/src/image/ImageManagerActions.cc
index 48c0650e2f..e7092b2460 100644
--- a/src/image/ImageManagerActions.cc
+++ b/src/image/ImageManagerActions.cc
@@ -328,11 +328,13 @@ void ImageManager::release_cloning_image(int iid, int clone_img_id)
 /* -------------------------------------------------------------------------- */
 /* -------------------------------------------------------------------------- */
 
-int ImageManager::enable_image(int iid, bool to_enable)
+int ImageManager::enable_image(int iid, bool to_enable, string& error_str)
 {
     int rc = 0;
     Image * img;
 
+    ostringstream oss;
+
     img = ipool->get(iid,true);
 
     if ( img == 0 )
@@ -351,6 +353,10 @@ int ImageManager::enable_image(int iid, bool to_enable)
             case Image::READY:
             break;
             default:
+                oss << "Image cannot be in state "
+                    << Image::state_to_str(img->get_state()) << ".";
+                error_str = oss.str();
+
                 rc = -1;
             break;
         }
@@ -366,6 +372,10 @@ int ImageManager::enable_image(int iid, bool to_enable)
             case Image::DISABLED:
             break;
             default:
+                oss << "Image cannot be in state "
+                    << Image::state_to_str(img->get_state()) << ".";
+                error_str = oss.str();
+
                 rc = -1;
             break;
         }
@@ -379,7 +389,7 @@ int ImageManager::enable_image(int iid, bool to_enable)
 /* -------------------------------------------------------------------------- */
 /* -------------------------------------------------------------------------- */
 
-int ImageManager::delete_image(int iid, const string& ds_data)
+int ImageManager::delete_image(int iid, const string& ds_data, string& error_str)
 {
     Image * img;
 
@@ -394,6 +404,8 @@ int ImageManager::delete_image(int iid, const string& ds_data)
     int gid;
     int cloning_id = -1;
 
+    ostringstream oss;
+
     img = ipool->get(iid,true);
 
     if ( img == 0 )
@@ -406,14 +418,27 @@ int ImageManager::delete_image(int iid, const string& ds_data)
         case Image::READY:
             if ( img->get_running() != 0 )
             {
+                oss << "There are " << img->get_running() << " VMs using it.";
+                error_str = oss.str();
+
                 img->unlock();
                 return -1; //Cannot remove images in use
             }
         break;
 
+        case Image::CLONE:
+            oss << "There are " << img->get_cloning() << " active clone operations.";
+            error_str = oss.str();
+
+            img->unlock();
+            return -1; //Cannot remove images in use
+        break;
+
         case Image::USED:
         case Image::USED_PERS:
-        case Image::CLONE:
+            oss << "There are " << img->get_running() << " VMs using it.";
+            error_str = oss.str();
+
             img->unlock();
             return -1; //Cannot remove images in use
         break;
@@ -436,6 +461,8 @@ int ImageManager::delete_image(int iid, const string& ds_data)
 
     if ( imd == 0 )
     {
+        error_str = "Error getting ImageManagerDriver";
+
         img->unlock();
         return -1;
     }
diff --git a/src/rm/RequestManagerDelete.cc b/src/rm/RequestManagerDelete.cc
index d0295a9d38..aa1a0e7317 100644
--- a/src/rm/RequestManagerDelete.cc
+++ b/src/rm/RequestManagerDelete.cc
@@ -174,7 +174,7 @@ int ImageDelete::drop(int oid, PoolObjectSQL * object, string& error_msg)
 
     ds->unlock();
 
-    rc = imagem->delete_image(oid, ds_data);
+    rc = imagem->delete_image(oid, ds_data, error_msg);
 
     if ( rc == 0 )
     {
diff --git a/src/rm/RequestManagerImage.cc b/src/rm/RequestManagerImage.cc
index 86bb1db118..7f96527854 100644
--- a/src/rm/RequestManagerImage.cc
+++ b/src/rm/RequestManagerImage.cc
@@ -38,17 +38,17 @@ void ImageEnable::request_execute(xmlrpc_c::paramList const& paramList,
         return;
     }
 
-    rc = imagem->enable_image(id,enable_flag);
+    rc = imagem->enable_image(id,enable_flag, err_msg);
 
     if( rc < 0 )
     {
         if (enable_flag == true)
         {
-            err_msg = "Could not enable image.";
+            err_msg = "Could not enable image: " + err_msg;
         }
         else
         {
-            err_msg = "Could not disable image.";
+            err_msg = "Could not disable image: " + err_msg;
         }
 
         failure_response(INTERNAL, request_error(err_msg,""), att);
diff --git a/src/vmm/VirtualMachineManagerDriver.cc b/src/vmm/VirtualMachineManagerDriver.cc
index 9cd9ea6ce0..d0adc0e5d3 100644
--- a/src/vmm/VirtualMachineManagerDriver.cc
+++ b/src/vmm/VirtualMachineManagerDriver.cc
@@ -403,7 +403,7 @@ void VirtualMachineManagerDriver::protocol(
 
         if ( result == "SUCCESS" )
         {
-            vm->log("VMM", Log::ERROR, "VM NIC Successfully attached.");
+            vm->log("VMM", Log::INFO, "VM NIC Successfully attached.");
 
             lcm->trigger(LifeCycleManager::ATTACH_NIC_SUCCESS, id);
         }
@@ -422,7 +422,7 @@ void VirtualMachineManagerDriver::protocol(
 
         if ( result == "SUCCESS" )
         {
-            vm->log("VMM",Log::ERROR,"VM NIC Successfully detached.");
+            vm->log("VMM",Log::INFO, "VM NIC Successfully detached.");
 
             lcm->trigger(LifeCycleManager::DETACH_NIC_SUCCESS, id);
         }