I followed these steps and ports but no luck. Is there something I missed?
http://guides.macrumors.com/Using_Remote_File_Access_to_Save_Disk_Space_on_Your_MacBook_Air
http://portforward.com/english/routers/port_forwarding/Linksys/WRT54G/
Cable Modem ---> Linksys WRT54G ---> Airport Extreme Base (bridge mode)
MacBook Air ---> MacBook (server), both on AEBS (802.11n)
http://guides.macrumors.com/Using_Remote_File_Access_to_Save_Disk_Space_on_Your_MacBook_Air
http://portforward.com/english/routers/port_forwarding/Linksys/WRT54G/
Cable Modem ---> Linksys WRT54G ---> Airport Extreme Base (bridge mode)
MacBook Air ---> MacBook (server), both on AEBS (802.11n)