Multi-table queries returning 0 rows with DSN-less connection viaOLEDB

[Michael Russell]

I'm working on a Windows client program in C++, using Qt and OleDbPro (for
database access). Everything was working great until I had to use a query
for the first time in the code that pulled data from two tables. The query
executes, but returns 0 rows. I verified that the query should return rows
by running the query both through another client using an ODBC DSN, and
using phpMyAdmin; both times, I got the result I expected.

I'm using the following connection string:
Driver={MySQL ODBC 3.51
Driver};server=2ksvr;database=mydb;uid=user;pwd=pa sswd;option=16386

I tried with and without using the JOIN format, someone suggested some ODBC
drivers don't work well with JOINs, but didn't make any difference

So, the question I have is, is there something special I have to do for a
DSN-less connection using an ODBC provider?