Handle specification in Sortable list doesnt work in IE

Hi!

The code works fine in FF but in IE if I don't indicate any handle, it
works fine but When i specify the handle, the item itself cant be
dragged.

I am using Script.aculo.us lib 1.6.4. Kindly help for the fix!

Sample Code:
Sortable.create("leftCol", {dropOnEmpty:true, handle:'tabNav',
hoverclass:'colhover', tag:'div', containment:["leftCol"],
overlap:'horizontal', constraint:false, ghosting:false});

Thanking you.