Index: lams_tool_mindmap/src/flash/AS/Branch.as
===================================================================
diff -u -r643162984254c265d82c6c6d5f2ff34c378e1ce4 -r749a219fd602faa3906933c8a08ab2ec99e314c5
--- lams_tool_mindmap/src/flash/AS/Branch.as	(.../Branch.as)	(revision 643162984254c265d82c6c6d5f2ff34c378e1ce4)
+++ lams_tool_mindmap/src/flash/AS/Branch.as	(.../Branch.as)	(revision 749a219fd602faa3906933c8a08ab2ec99e314c5)
@@ -80,10 +80,6 @@
 			try{
 				this.sons.removeChild(branch);
 			}catch(error:ArgumentError){};
-			if(this.sonCount==0){
-				this.expanded = true;
-				InternalConcept(this.base).checkButtons();
-			}
 			this.mindMap.conceptRemoved(InternalConcept(branch.base));
 		}
 		public function getConceptById(id:int):Concept {
Index: lams_tool_mindmap/src/flash/AS/InternalBranch.as
===================================================================
diff -u -re28d61401c1f05f1b3db8068f7ad76f161e90f09 -r749a219fd602faa3906933c8a08ab2ec99e314c5
--- lams_tool_mindmap/src/flash/AS/InternalBranch.as	(.../InternalBranch.as)	(revision e28d61401c1f05f1b3db8068f7ad76f161e90f09)
+++ lams_tool_mindmap/src/flash/AS/InternalBranch.as	(.../InternalBranch.as)	(revision 749a219fd602faa3906933c8a08ab2ec99e314c5)
@@ -103,5 +103,12 @@
 			super.addBranch(branch);
 			branch.balance = this.balance;
 		}
+		override public function removeBranch(branch:InternalBranch):void {
+			super.removeBranch(branch);
+			if(this.sonCount==0){
+				this.expanded = true;
+				InternalConcept(this.base).checkButtons();
+			}
+		}
 	}
 }
\ No newline at end of file