Subject Firebird 1.0 - RC1 & IBO

I have installed de Firebird 1.0, and I found some problems using
IBO 4. Before install this server, I'm had the InterBase 6.0.
I'm developing a application, using Delphi 5.0 and IBO. Before
change the server, everything is ok, but now I can't run my
When I try to execute, I have the error "Invalid Handle"

I just want to know if IBO are compatible with FireBird 1.0, and
what I must do to solve this problem!

Thanks, for all!