UWL Configuration wizard is appearing as blank

Hi,

I Would like to do the customization in the UWL Customization main page. after clicking on the " customize the look of the UWL main page" , .it is appearing as blank . and the drop down is appearing as blank.usually it supposed to be appear as a table with all the tabs of UWL .which allows customization.

if anyone aware of the resolution to this problem, pls let me know.

Rajyalakshmi.