Problem with fb-client on connections with low bandwith

Hi!

This is my first post here, so if there is more specific information needed, please ask!

I have migrated a Borland CPPB application from Intebase to Firebird. It uses the IBX components with both CPPB 5 and BDS 2006. After some time I realize there is a problem running client connections over a network with limited bandwith. The network doesn't have the required capacity for all applications using it and sometimes it has almost zero throuput.

I handle the exceptions returned, and this has never been a problem until we switched over to Firebird. With the Firebird client we don't get any exceptions or errors. The connection thread just hangs and never releases again. With the IB client the thread returns with an exception or error.

I have also tried the native IB client and FB client API in a test application and I get the same results. The IB client returns with error and the FB client hangs.

With IBX I use the "patched" gds32 dll. Running with my testapp (client API) I use the native IB and FB clients.

The server is FB ver 1.5.3.

Anywhone have an idea what is causing this behaviour?

Thanks in advance for all help!

/vfr