bittorrent doesn't download anymore - please help

[intruder1400]

I could use some help, can't solve a problem.

I have a readynas duo on witch bittorrent worked fine. It was behind a netgear router. Now I got a new whireless modem from my provider (thomson twg870ug) but after the install, bittorrent doesn't download. I downloaded the torrentfile, uploaded it to bittorrent, but no effect. The download is shown, but no action.

I changed all the ip adresses (nas, laptop, ipad, etc) in the same range of the router 192.168.0.--- . The modem/router is 192.168.0.1, witch is the same number I gave to the ' gateway' in the nas settings.

I can login (whired and whireless) tot the nas and modem/router and open the bittorrent screen.

I installed transmission and had the same problem. I asume it has something to do something with the settings of the modem/router. Maybe portforwarding? I set the port 6881 (shown in bittorrent) 'enabled' linked to the ip adres of the nas.

I hope this is enough information to help me out. It would be great if I get some assistance.

Thanks.