Connecting via SQL

SUGGESTED

I work for a software dev company that is setting up an application for a client. They have been using the Timberline Data driver (using ttsimba.dll) to create an ODBC DSN to their Sage 300 CRE data in Access and run some update queries. We are replacing the Access database, and need to connect to the data with SQL Server. We have tried creating a SQL linked server, using the DSN that was working in Access, but with no success. What is the best way to connect to Sage 300 CRE data from SQL Server?