Iím confused. In your first post did you mean OLD where you put. NEW in the ďI CAN...Ē section? Iíll assume so. Assuming the new computer is on a different local IP address, maybe even still bouncing around on an INTERNAL dynamic IP being assigned by your router, then the internal IP wonít be the same and the external to internal port forwarding wonít work.

If your new computer is on exactly the same internal (192.168.x.x) address, and at the time youíre testing the old computer is off or completely disconnected from your internal net, and itís internal address is static, then I canít offer any thoughts except to check everything according to the getting started section in ACP Help, and also make sure that the Windows Firewall permits inbound connections to ACP.EXE.