What is the difference between the Access and the SQL Server Versions?
The MS-SQL version can handle much more users at the same time than the access version. Access database has a size restriction (2GB) and tends to fall when dealing with heavy traffic. Selecting Access versus SQL Server depends on how much traffic you expect to get at your site. Access is not as robust as SQL Server, but easier to use and maintain (cheaper). The MS-SQL version is for high traffic sites, and need an experienced programmer to handle it.