kick bug

Whenever i try to join it says i was kicked for "disallowed connection" and its like i was banned but i wasnt (hopefully) can someone help me please

This is something that has been happening for quite some time now but today I thought that this really needs to be posted. I was playing Layer Spleef just now and I started right from the beginning, won all of the games except the last two at the end (coming 3rd in one of them) and all together...