I am trying to configure a 32bit !!S web services application to work on Windows 2008 R1 64bit which connects to an Oracle database. On the Web Services server I have an Oracle 32bit client installed, a Application pool for 32 bit applications, and my connection string is correct. When I try to send to the web service I get the following error " Server was unable to process request An OLE DB Provider was not specified in the ConnectionString". I have a Windows 2008 R1 32bit environment setup exactly the same and it works fine. Are there any issues using a Oracle 32 bit client on a Windows 2008 64bit machine? Or should I say problems accessing classes?