Leave request approval

Hi,

Iam facing a problem, while approving the leave request from UWL, when selected the Work item,

the approval screen is not shown, instead it gives a 404 Error

We are in ERP2005 EP7

This is happening even after changing the values in the transaction SWFVISU

I have the value now as sap.com/ess~lea

still it is not working

thanks in advance

sera