Marketing Attributes not updating in BP through Suvery

Hi friends,

I m working in CRM 5.0, i want to update marketing attribute of BP using survey response, i have created survey which include marketing attributes, in survey setting i have maintained

Callback to PBO    CRM_MKTBP_SVY_ATTRIBUTE_PBO

Callback to PAI      CRM_MKTBP_SVY_ATTRIBUTE_PAI

further i have generated survey url using BSP option, next i have assign this survey url  to  mail form, Customers/BPs can open the mail and able to fill the survey successfully, but when i checked in master data of BP no marketing attributes are assign to them(Marketing attributes are not updating).

Please help me to resolve this,do  i will have to add marketing attribute anywhere in FM code ?? i have also read sap note : 638320 but no success.

Thanks,

Vivan