I have two PC's running Windows XP home connecting to a router. On one of the PC's I have created a mapping to the other one to share an application. The trouble is I can't access the "Program Files" folder, I get the Access denied message. One PC is running SP1 & the other SP2. From the PC running SP2 I can access anything on the other PC but can't seem to access anything the other way round, any ideas?