Would you please tell me what is your version of mdm.exe? and the version of VS and Office you are using? Mine is 7.10.3077.0 and is a part of Microsoft® Visual Studio .NET 2003 and my Office is 2003. It seems since I have installed office 2003, I am not able to debug script errors in MSE. When I click Yes to debug nothing happens. I have not disable script debugging in Interent Explorer. I posted it here cause it seems a conflict between VS .NET and Office. Have you experienced such problem?