Question : Problem: cannot RDP in to a WMvare machine from Internet

I have a box with VISTA on and I installed a virtual machine WMVARE with windows 2000.

I have a cable connection and a router (netgear RO614V2).

I can ping my VM, I can RDP into my HOST from internet, I can RDP from my host to my VM, I CANNOT RDP FROM INTERNET INTO MY WM.

I also have a DYNDNS account.

I forwarded from my router port 3389 to the IP address of my host, but when I try to forwsrd port 3389 to my VM the router find an overlap of ports.

I therefore changed the listening port of my VM to 3399 and forwarded my router to this port with the IP address of my WM... IT DOES NOT WORK !!
I DO NOT KNOW NEARLY NOTHING on NETWORKING, so your asnwers must be quite articulated (like you are explaining something to a baby :) )
Please help

Answer : Problem: cannot RDP in to a WMvare machine from Internet

there is an conflict indeed on port 3399
the CSM (channel sharing method) protocol is used on that port