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I am upgrading a VB6 program at work and one of the changes is that it now uses PostgreSQL 9.2.4 instead of 8. I was getting a 'client encoding mismatch' error, so I updated the ODBC driver, and the problem went away. However, with the new driver, my program does not want to connect to a custom service that it uses anymore.

The custom service uses postgres a lot. The error I'm getting is '(10061) connection is forcefully rejected'. Postgres is configured to accept connections from any IP address, so I'm not sure why I'm getting this error. The program will connect fine to the custom service with the old version of the ODBC driver, but as soon as I start using the new driver, it does not want to connect. I've checked the services list and both postgres and the custom service are started.

At one point, while trying to connect to the custom service, I was getting an error that said something like "OLE DB error: cannot send query to the backend". However, I can't seem to reproduce this error message anymore, it is simply not connecting.

To install the psqlodbc driver, I downloaded the psqlodbc_09_00_0310 msi and installed it and I also tried dropping the psqlodbc_09_00_0310 dll's into the sysWOW64 folder. I changed my program so that it references the correct driver in the registry. Am I doing this right?

I don't have a lot of database experience, so I apologize if this information is confusing or incomplete. Please let me know if you need clarification on anything.

Any suggestions would be appreciated, even if they are just ideas on how to troubleshoot this issue.

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