Any VB programmers? Getting strange error

Using VB 5.0, I've compiled an ActiveX .DLL which performs the user login to our Informix 7.2 database and all other database querying. From my client VB app, I can instantiate this object and login successfully one time. After terminating the app and retrying, I always get the error, "Cannot find ISQL.IEM", followed by some other messages. I believe that this file has something to do with "environment variables" on the server, but I don't understand why this works once and never again until I restart Windows 95. I've tried to be careful to set all object variables to "Nothing" in the .DLL code before terminating, and I also destroy the ActiveX object reference in the client app before it terminates. So far, I haven't had any luck with this question in the VB newsgroups so I thought I would try here. I would greatly appreciate any e-mail responses to: rmayer@tssc.com -- - Robert Mayer - "The Original Pong God"