I can connect to Oracle QC DB with Toad. When I connect using VBscript I get the following error

"TNS Could not resolve service name."

My tns.ora file has tdoraserve123 defined. I use the following connection string.

Dim strCon: strCon = "Driver={Microsoft ODBC for Oracle}; " & _
"CONNECTSTRING=tdoraserve123; uid=123;pwd=123;"

Any ideas how I can fix it.