diff --git a/src/main/java/org/gcube/portlets/user/shareupdates/client/form/ShareUpdateForm.java b/src/main/java/org/gcube/portlets/user/shareupdates/client/form/ShareUpdateForm.java
index 73bce8b..5d23ed1 100644
--- a/src/main/java/org/gcube/portlets/user/shareupdates/client/form/ShareUpdateForm.java
+++ b/src/main/java/org/gcube/portlets/user/shareupdates/client/form/ShareUpdateForm.java
@@ -174,6 +174,7 @@ public class ShareUpdateForm extends Composite {
 		if (myLinkPreviewer == null) {
 			uploadProgress.initialize();
 			uploadProgress.setVisible(true);
+			attachButton.setVisible(false);
 		} else {
 			Window.alert("You cannot post two files, please remove the previous one first.");
 		}
@@ -343,6 +344,7 @@ public class ShareUpdateForm extends Composite {
 			public void onFailure(Throwable caught) {
 				uploadProgress.showRegisteringResult(false);
 				preview.clear();
+				attachButton.setVisible(true);
 			}
 
 			public void onSuccess(LinkPreview result) {
@@ -377,6 +379,7 @@ public class ShareUpdateForm extends Composite {
 	 * @param result
 	 */
 	private void addPreview(LinkPreview result) {
+		uploadProgress.setVisible(false);
 		myLinkPreviewer = new LinkPreviewer(this, result);
 		preview.add(myLinkPreviewer);
 	}
@@ -386,5 +389,6 @@ public class ShareUpdateForm extends Composite {
 	protected void cancelPreview() {
 		preview.clear();
 		myLinkPreviewer = null;
+		attachButton.setVisible(true);
 	}
 }