Price comparision in ECC 6.0

Hi,

we are moving from 4.6 c to ecc 6.0.I am facing problem while comparing quotations.In 4.6 c,it is working fine but in ecc 6.0 giving an error.

I put the collective RFQ number in the initial screen while carrying out T-code ME49.

when i execute in get the message as ""Selected quotations not directly comparable""

I have maintained the prices in maintain quotation, but still i get in the field as ""quotation item not yet maintained "" in ME49.

Can anyone please suggest where am i going wrong and also whether any customiziing has to be carried out.

Please help me ASAP.

Thanks,

Sateesh