firstly, you dont need a primary connection... but if you really want one
the connection too slow is because your selected connection speed is in correct, go to settings and select the correct option (DSL)
the TCP/UDP errors are because you aren't able to recieve inbound TCP connections/UDP packets, this could be a firewall or a router blocking it
if you have XP then you also have the XP firewall to contend with
https://www.winmxworld.com/tutorials/firewall.htmlif you share your connection with more than one computer you are likely to also have a router, if thats the case let us know and we will try and help you with that
(its probably easier to help with that if you come in to our chat room though)