SAP PM-MM Service PR Valuation price not getting updated

Hi Experts,

When I am creating a purchase requesition for service from Maintenance Oder, price in the Valuation Tab of PR is found to be 0.00, where as the Gross Price in Service is need to be copied to Valuation price and connot proceed to process for PO.

If I create a service PR directly in material management module using the same data, Valuation price is getting updated and so on the process is smooth.

Somebody throw some light is any settings or check to be carried out in MM.

Please find the attached screen dumps of the whole scenario.

Thanks in advance..

Thank and Regards

Seshagiri Rao