unable to generate syncbos

Hi

After uploading the standard MAM30 syncbos from MEREP_MIG system is not generating syncbos in MEREP_sbuilder , it syas that Bos are already been published while in MEREP_PD i see them in not generated and not able to enable them .

Is there any way to delete the standard bo uploaded and reimport import the .txt file .

Did any one face this problem earlier ?

Regards

siddhartha