Ok.. nothing changed.
My router is a d-link DI-604

internet<-->router<-->server<-->my PC

You were right, my IP adress is different from the IP adress of my individual machine. The problem is that my router is asking for a private IP. There is also no option for forwarding my NAT although this is said in the support webpage.

"D-Link´s broadband routers (ie: DI-604) support NAT. With proper configuration, multiple users can access the Internet using a single account via the NAT device."

my router options:
-----------------------------------------------------------
Virtual Server
Virtual Server is used to allow Internet users access to LAN services.

x Enabled Disabled

Name limewire

Private IP 192.168.0.6

Protocol Type Both

Private Port 6346

Public Port 6346

Schedule always
------------------------------------------------------------
Firewall Rules
Firewall Rules can be used to allow or deny traffic from passing through the DI-604.

x Enabled Disabled

Name limewire

Action x Allow Deny

Interface IP Range Start IP Range End Protocol Port Range

Source WAN *

Destination LAN 192.168.0.6 * 6346

Schedule x Always
-----------------------------------------------------

Am I doing something wrong?
I've tried the other IP adress which I got from whatismyip.com but it still didn't work.

I don't understand. I paid to get pro and I'm not getting anything out of it.

I would appreciate if someone could help me and tell me what I'm doing wrong.

Thank you

a l k s