Disregard this. My configuration page dll was compiled with the (default) dll runtime library - changing this to the statically linked library fixed the problem. Jeff ----- Original Message ----- From: Jeff Pages To: wdmaudiodev@xxxxxxxxxxxxx Sent: Friday, March 23, 2007 11:57 AM Subject: [wdmaudiodev] Driver property page problem on 64-bit Server 2003 Our audio driver installs a configuration page under the device properties, by installing an EnumPropPages32 entry in the registry, ie. in the AddReg section of the inf file I have: HKR,,EnumPropPages32,,"AuriconProp32.dll,EnumPropPages" or, in the 64-bit inf file, HKR,,EnumPropPages32,,"AuriconProp64.dll,EnumPropPages" where AuriconProp32.dll and AuriconProp64.dll are the 32-bit and 64-bit versions of my property page dll. This works fine on all the 32-bit platforms (2000, XP, Server 2003 and Vista) and on 64-bit XP and Vista, but not on 64-bit Server 2003! Does anyone know what is different on that platform? Jeff Pages Innes Corporation Pty Ltd