Thanks again Richard. I appreciate your help. I've now solved the problem. What I did was to download the Compatibility Assistant from MSDN, and created and installed a .sdb compatibility shim, with the setting "Run As Invoker". Everything now works exactly as it did under Windows 7. Thanks again. Ian

Hi, Please don't be discouraged! Taking the time to trace and find a solution to a Windows 7 security issue is commendable! :) :) April Comm100 - Leading Live Chat Software Provider