PSQL 7 came with an ODBC Driver as well, if I remember correctly. You might try the Pervasive driver.
I can't tell you what's wrong because I don't have and have never used the Intersolv driver. It may not support the "_" or the "$". Or, the Intersolv driver may use a different delimiter than double quotes. It could be square brackets ("[" and "]") or even braces ("{" and "}").
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Mirtheil Software
Certified Pervasive Developer
Certified Pervasive Technician
Custom Btrieve/VB development
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