As I have other clients (granted a very small number) running Adagio on a 64 bit server without any issues, the 64 bit O/S is not specifically a problem but the O/S could still be the issue (MS bug fixes have broken none MS applications before).

Is it your hardware? When you say you mounted a 32 bit server did you do so uisng a different box?

Is it your install of Adagio? Is it Adagio itself? Both questions are nearly impossible to answer in this forum. The first requires a detailed examination of your install and the second would be difficult to assertain without eliminating the first.