I had an application that I was working where the client insisted on using an Access database for the application. The application was running on a two node server farm so the Access database had to be located on a seperated machine and accessed over the network. When upgrading the server farm from 2000 to 2003 the client ran into an issue accessing the database.
After checking to make sure it wasn't an error with the connection to the location where the database was held I attempted to put the database underneath the site and connect to it there. Well that connection worked fine and the data could be accessed.
Long story short after some research and some long hours on this I found that the issue was a combination of things. First under IIS 6 all applications are run under application pools. The application pools do not pass the identity along that they run under. This creates a problem when trying to access a remote drive. To solve this issue you can enable impersonation of the account that you had IIS to run as the anonymous user. To do this you need to open the web.config file of your application. Under the
< IDENTITY impersonate="