Commented Issue: Object reference not set to an instance of an object [5097]

I tried installing Sharepoint Manager 2007 from codeplex on my win 2008/MOSS 2007 development box. However, when I double click on the exe file "SharePoint Manager 2007.exe", it gives me a message "Object reference not set to an instance of an object". What does it mean and how do I fix it?
Comments: ** Comment from web user: PeterB **

Ok the issue was the SQL Server service had crashed.