So what you're seeing is probably AOLserver segfaulting. It look like AOLserver tries to make a connection to PG, and then it dies, hence creating the unexpected EOF error from PG's part.
I'd say you most likely have a driver problem. Something is not right in your compilation or you have an older version of the driver.
You can download nspostgres from aolserver.sf.net these days. It's the most current version.