This is somewhat common for Legacy 32bit Progress cleint apps that have been around a long time. Its hard to upgrade all the client software. As long as the Appserver code does not have any 32-bit dependencies then you can install the 32-bit client Networking and associate the client app to prowin32.exe. PASOE being 64bit should not impact your software if (again) you dont have any backend code with 32bit DLLs or controls. The main issue is that you have to manage is both the 32 bit client and 64 bit backend on the same machine if you install the client on the server.