Reference Module in SAP

Hi ,

I am trying to use t-code WRF_REF  reference for articles without history.I am able t do so but when i try to put reference number i get the following error message Message no. WRF_REF080. I am able to save without reference number but in FnR data is not transferred.

Please suggest how can i make reference module in SAP and transfer to FnR

Thanks

Sachin