diff --git a/src/fr/mikrosimage/gwt/client/ResizableHeader.java b/src/fr/mikrosimage/gwt/client/ResizableHeader.java
index 3f7332e..b158c63 100644
--- a/src/fr/mikrosimage/gwt/client/ResizableHeader.java
+++ b/src/fr/mikrosimage/gwt/client/ResizableHeader.java
@@ -251,7 +251,10 @@ private ColumnMoverHelper(IDragCallback dragCallback, Element target, NativeEven
             this.dragCallback = dragCallback;
             final int clientX = event.getClientX();
             columnWidth = target.getOffsetWidth();
-            final Element tr = target.getParentElement();
+            Element tr = target.getParentElement();
+            while (!tr.getNodeName().equals("TR")) {
+            	tr = tr.getParentElement();
+            }
             final int columns = tr.getChildCount();
             columnXPositions = new int[columns + 1];
             columnXPositions[0] = tr.getAbsoluteLeft();