Error while adding set type to CRM Web UI(7.0)

Hi Gurus,

I was trying to add the custom set type to the product screen in Web UI . Followed the steps narrated in

http://wiki.sdn.sap.com/wiki/display/CRM/CreatingUIConfigurationforSetTypestodisplayonCRMProductOverviewpage.

Now the URL assignment Block is appering in lazy load. When I try to open I am getting the error

Diagnosis

An exception occurred during request processing. This was handled centrally. It changed the program flow and the result of the request probably contains errors.

Procedure

Contact your system administrator.

Procedure for System Administration

Activate checkpoint group BSP_WD_EXCEPTION_DISPLAY. To do this, use transaction SAAB. If the error recurs, further details are displayed.

Exception Details

CX_BSP_WD_INCORRECT_IMPLEMENT - Define component usage 'ZURLSETTYPE'

Method: CL_BSP_WD_REPOSITORY=>GET_CMP_USAGE_DEF

Source Text Row: 20

Is this a prob in customization or something else?

Please help

Thanks,

Neeraj