imprec question

Hi,
I'm new to upacking and i would like some help on imprec. I attach to the process i want to dump, i use IAT AutoSearch, then get imports, i use autotrace for all invalid imports, but when i try fix dump i get a message saying 'Invalid dump file! Can't match RVA to Offset in the dump file'. The dump is created using armkiller.

Thanks a lot,
fotisl