Subject Cannot log into database

I don't know if this is Firebird or a BDE issue but I am trying to port a legacy client that runs on FB 1.5 from an XP system to a WIN7 (64 bit) system.

I was able to install FB 1.56, the client software with its fdb onto the WIN7 system. I also had to install BDE 5.01 since that is what the client uses. I redefined the ALIAS in BDE Administrator to point to the fdb on the WIN7 system. 

When I run the client trying to use the fdb on the WIN7 system I get an "unknown user name or password" error. If I point the ALIAS to the fdb on the old XP system I can run the client from the WIN7 system but it is accessing the fdb on the old system. This would be OK except I want to get rid of XP altogether and getthe database on the WIN7 system.

With FlameRobin on the WIN7 system I can register and access the WIN7 fdb using the default username and passwords so it appears these are correct (they match those on the XP system). I can even run queries and see the data. However, when I try to open the WIN7 fdb through BDE Administrator I get the "unknown user name or password" error. My guess is that if we can get BDE to log into the fdb then the rest should fall in place (hopefully !).

Has anyone else run into this ?