diff --git a/lib/ajax/block_classes.js b/lib/ajax/block_classes.js
index 6b7c9cfdc6c..da4f0df5124 100644
--- a/lib/ajax/block_classes.js
+++ b/lib/ajax/block_classes.js
@@ -245,7 +245,7 @@ block_class.prototype.delete_button = function(){
 
 block_class.prototype.update_index = function(index,columnId){
        //update via AJAX the db representation of page
-       main.connectQueue_add('post','class=block&field=position',null,'value='+columnId+'&weight='+index+'&instanceId='+this.instanceId);
+       main.connectQueue_add('post','class=block&field=position',null,'value='+index+'&column='+columnId+'&instanceId='+this.instanceId);
        if(this.debug)YAHOO.log("updating position of "+this.getEl().id+" to index "+index+" on column "+columnId);
     }