RPC error using Openlink ODBC to DSA 7.22

We are trying to configure Openlink (MT) ODBC on a Win'95 client talking to a HP-UX 10.20 Dynamic Server 7.22, We are getting "RPC: Program unavailable" errors when using the C++ Demo that comes with the evaluation copy. We can ping the server and have been advised to remove the onsoctcp stuff from onconfig and sqlhosts. Does anyone have any ideas ? Thanks, Steve Gould