I have the latest 64 bit version of PostgreSQL. I am running Win 7 64 bit. I had installed the ODBC driver (via the initial installer) when I installed PG, and upgraded it t
As I see PostgreSQL installer doesn't include 64 bit version of ODBC driver, which is necessary in your case. Download psqlodbc_09_00_0310-x64.zip and install it instead. I checked that on Win 7 64 bit and PostgreSQL 9.0.4 64 bit and it looks ok: