If you are running any sort of server daemon, especially on a non standard port then it could be getting stuck in that, commonly scanned ports are as follows:
HTTP:80;
HTTP:8080;
HTTP:3128;
HTTP:6588;
SOCKS4:1080;
SOCKS5:1080;
ROUTER:23;
WINGATE:23;
HTTPPOST:80;
HTTP:81;
HTTP:8000;
HTTP:8001;
HTTP:8081;
HTTPPOST:81;
HTTPPOST:6588;
HTTPPOST:4480;
HTTPPOST:8000;
HTTPPOST:8001;
HTTPPOST:8080;
HTTPPOST:8081;
SOCKS4:4914;
SOCKS4:6826;
SOCKS4:7198;
SOCKS4:7366;
SOCKS4:9036;
SOCKS5:4438;
SOCKS5:5104;
SOCKS5:5113;
SOCKS5:5262;
SOCKS5:5634;
SOCKS5:6552;
SOCKS5:6561;
SOCKS5:7464;
SOCKS5:7810;
SOCKS5:8130;
SOCKS5:8148;
SOCKS5:8520;
SOCKS5:8814;
SOCKS5:9100;
SOCKS5:9186;
SOCKS5:9447;
SOCKS5:9578;
Theres a whole lot more than that commonly scanned but I can't be bothered finding the other list.
If you aren't running anything on the above ports then it is possible, unlikely but possible, that mlg.* requires you to have identd running (install/enable identd and forward port 113 to your pc) and reports anyone who doesnt have it as an open proxy.
Other than that, chances are its just an old ban because of your dynamic ip and it may expire soon or you may have to wait for a new ip to be assigned to you.