diff --git a/org.adempiere.ui.zk/theme/default/css/theme.css.dsp b/org.adempiere.ui.zk/theme/default/css/theme.css.dsp
index 69529d0990..555e0d056d 100644
--- a/org.adempiere.ui.zk/theme/default/css/theme.css.dsp
+++ b/org.adempiere.ui.zk/theme/default/css/theme.css.dsp
@@ -882,14 +882,10 @@ div.simileAjax-bubble-container {
 	background-image: none;
 }
 
-.z-window-highlighted {
-	z-index: 1900 !important;
+.z-modal-mask {
+	z-index: 1800 !important;
 }
 
-.z-window-popup {
-	z-index: 1900 !important;
-} 
-
 .grid-layout {
 	border: none !important; 
 	margin: 0 !important;