Hello again Per. I found this, which seems related but might not be the same issue since you say that you closed the connection before returning:

http://social.msdn.microsoft.com/Forums/en-IE/sqlnetfx/thread/e9e7c707-87fb-49cc-bd0b-d426ed53a534

For now, I would just stick with the connection string that works since it is still better than filling up memory with the entire collection before releasing it back to the calling query.

Take care,

Solomon...

PS, if you want, you can just send me the code and I can try to look at it. Just click on my name to the left to see my details and then select "Send Email".