Oh.. yes.. now I understand.

Asp.net user (or network services or whatever) user is local user and there is no information about this user on other computers or domain. You should use impersonate within web.config file (or I can you provide a component that allow network identification)

Primoz

Sorry, module is not free (99$) . You can try fully functional demo from http://components.init.si/ 

if it works for you then I can describe you how to use component for your needs (in this manner you can use component for free) or you can just buy module :-)

Module was not designed to use in this way, but there is "workaround" (one extra step) - I just try it and it works. Step by step procedure for your example:
-(download and install module and )  first enable "Allow save binary data to file system" inside module settings 
-input shared folder path, username and password inside "table settings" (fields are gray).  
-input connection string (odbc - example: Driver={Microsoft Access Driver (*.mdb)};DBQ=c:\Inetpub\Examples\App_Data\indooTestDB.mdb;DriverId=25;FIL=MS Access;) to existing mdb file on  local computer
- input valid table name from this file
- click update
- input connection string with path to mdb file on shared (same as above) folder 
- click update and then use module as you want

Next version of module will support this without this extra step :-)

Regards,

Primož