>I want to change my Backend from MSDE to MSSQL Express.
>For testing I have done the following things
>
>-Attached Database to MSSQLExpress.
>-In SQLStringConnect() the only thing I changed Server=myserver to Server=myserver\SQLExpress.
>
>After doing this everything is fine.
>
>Has anyone experienced any difficulties by upgrading the Backend?
>What other things should I take care for?
>Can I change the same Database from SQLExpress to MSDE again?
>
>Thanks

As an addition to what Boris said. Forget going back to MSDE. MS already has plans to eventually drop MSDE alltogether (ie: no support in Vista).
Cetin