SHARE DIAL UP INTERNET & LAN

I HAVE LAN CONNECTION TO SHARE FOLDERS & FILES FROM OTHER & MY COMPUTER IN MY OFFICE,

I HAVE INSTALED DIAL UP NETWORK CONNECTION IN MY COMPUTER. BUT WHEN I WANT TO SHARE THIS NETWORK CONNECTION I COULD NOT ABLE TO ACCESS MY LAN.

IF THERE IS ANY SLOUTION TO SHARE DIAL UP INTERNET & LAN BOTH AT SAME TIME PLZ INFORM ME.

SANTANU