I can help!!
I jsut got my DL-524 to port forward.
First- Reset your router. Ask your parents first, though, incase they use it.
Second- Manage your WIFI settings, you know, Ap name and WEP.
Third- Go to Advanced/Filters
Fourth- Add Blockland, ports 28000-28030 (not too hard) and enable it. Make sure you are allowing and not blocking.
Worse comes to worse, you can update your firmware and I'll send you my config settings.