Question : Failed to generate a user instance of SQL Server due to a failure in starting the process for the user instance

hi,
I am getting this problem now:
"Failed to generate a user instance of SQL Server due to a failure in starting the process for the user instance "
i've been to many posts but nothing has helped me so far, I've done the following:
1-Deleted the SQLExpress folder under the localsetting to clear it
2-Set User Instance to False/True
3-Change the SQLExpress to run under a local account (Administrator)
nothing has help me, and i am wasting too much time on it. It works (Ofcourse on my dev machine).
both dev and target machine are XP SP2. I am using Visual Studio 2008 Pro - C# Windows application so no IIS or ASP.NET issue.

has ANYONE solved this annoying problem?
thanks again

Answer : Failed to generate a user instance of SQL Server due to a failure in starting the process for the user instance

Well, from what I have looked at, you are trying to connect to express the correct way.  However, it may be worth a shot to try to connect differently.  Give this a shot for your connection string instead:

Driver={SQL Native Client};Server=myServerAddress;Database=myDataBase;Uid=myUsername;Pwd=myPassword;

By the way, I got that connection string from:
http://www.connectionstrings.com/