Informix OnLine 7.2 for WinNT4.0 BIG Problem

I am in the process of setting up an Informix OnLine database server running on Windows NT 4.0. I installed ESQL/C (which I'll be using to code for the server), then I installed Informix OnLine 7.2. Role-separation was enabled, and everything was installed as the Administrator account (which Informix assures me is the proper way to do it). SetNet32 was run, using the defaults in most of the cases (except for naming the dbserver and the sqlhosts machine, which as far as I can tell, were both done correctly). Anyone who could be using the server was made a member of the ix_users group, and the services (Message and Database Servers) were set to automatic (database was started by the informix user rather than the system). Now, after all that (to set the stage, since everytime I've managed to get in touch with Informix, they asked me all that), whenever I access the database locally though DBAccess, I can fiddle with it just fine, everything does what it's supposed to do. However, whenever I write a program using the ESQL/C preprocessor to do even simple things (connect, make a table, populate it with one row, and exit), I get error -25571 (cannot create user thread) every time. I tried changing the ONCONFIG file so that it specified the number of threads rather than letting it default (but even if it defaults, it defaults to 50!). I'm really stumped here, and I can't get any further on the project I'm working on until I can make my programs interact with the database. If anyone can come up with something to help me out, I'd be VERY thankful. Thanks in advance, Steve DeLong katt@vt.edu