Could there be a failure to pass any command line arguments when using TS that are properly passed if you are manually open the db?
Are you attempting to read any Command properties in vba that if missed, cause the form to not open and code is processed that simply closes the db?
If so, you might want to try suspending all code temporarily and ensure nothing closes the db.
I used TS successfully with accdb, but I put my command line switches in a shortcut.
The more we hear silence, the more we begin to think about our value in this universe.
Paraphrase of Professor Brian Cox.