do you need the clients

If i use sql server as my backend and microsoft access as my frontend do i need to purchase client access lisences??yes,

have a look at the following

http://www.microsoft.com/windows2000/en/server/help/default.asp?url=/windows2000/en/server/help/sag_LICEconcepts_121.htm

http://www.microsoft.com/windows2000/en/server/help/default.asp?url=/windows2000/en/server/help/sag_LICEconcepts_122.htm

Cheers