Question about Primary Keys in MSDE

I upsized an Access database into MSDE to begin scalling it up to SQL Server.
I have a curious problem: my queries don't return any results if the table has a Access primary key before they are upsized.
I've deleted and re-created the database to check this, and if I use Access to remove the primary key before upsizing, the queries will return a result; if I re-instate the primary key and upsize again, the queries return nothing.
(This is true regardless of using VS Net, Web Matrix, or by hand...)
I'm a newbie with MSDE and with upsizing from Access. Is this expected -- or have I maybe done something wrong, again?
- Tinker
Nevermind... The whole MSDE-Access-Upsizing thing just got to be too much and I switched over to SQL Server 2000. That solved EVERYthing.
Tinkersql