Since you are using workgroup security, this info may be wrong, but give it a try. I think the username and password in the connection properties is for the the login for Access, not the file sysyem where the Access db is located. Try leaving username and password field blank (or "Admin" as the username and a blank password). Alternatively, you can play with the Assess login information located under /Tools/Security. This is guess at this point. I will try to recreate this tomorrow.