I am running Delphi 5 on Windows XP
Firebird is running ok

When I try to run a webserver (either exe or dll) I get error messages

Exception: EAccessViolation
Message: Access violation at address ...

or

Exception: EIBClientError
Message: Cannot create shared resource. (Windows error 5)

Debug implies that the error is here

FWriteLock := CreateMutex(nil, False, PChar('IB.SQL.MONITOR.Mutex'));

inside TIBSQLMonitorHook.Create

When I compile the same code using Delphi 6 (at work, I have 5 at
home), there is no error and the firebird data is displayed.

I would appreciate any help with this.
Thanks,

Robert