Help needed: 500gP and Microcom router

Hello, I need to setup my virtual server, (I have Icecast server installed on my machine it works on port 8000)

I have dsl router Microcom 2656 connected to dsl, and one LAN is connected to WAN port in 500gP.

The ip settings is following:
x.x.x.x is the ISP assigned IP (external Microcom)
10.0.0.2 is Microcom 2656 IP
10.0.0.7 is external 500gP ip
192.168.1.3 is ip of my computer where is Icecast server.

I tried to setup 2 virtual servers
on Microcom:
incoming port 8000, local port 8000, local ip 10.0.0.7
on 500gP
incoming port 8000, local port 8000, local ip 192.168.1.3 (wireless connection so I cannot attach my server to the microcom directly)

it does not work :-( (the normal internet is working)

I dont know how to setup that Microcom router as a bridge :-( if some1 can help me how to setup that virtual server or whatever I will be so happy :D