Cannot restore my ms-sql db locally

I have the same ms-sql db on 3 different ISP's (call them db1, db2, db3) and they all work fine on the 3 different e-commerce sites.

I am able to restore my db1 locally in SQL Express and run it from my local installation, however if I try to restore from db2 or db3 they error out, even though db2 and db3 are testing  installations of the same db only with different data.

Before I try to restore db2 or db3 I delete db1 and db1_LOG from the SLQ Express DATA folder. Is there anything else I should be doing?

Thanks,

Allen Cunningham

Life is hard, but it's harder when you're stupid! John 'Duke' Wayne