Greetings!
Have you tried other wireless infrastructures to connect to? Also what type of bandwidth it being offered on the current wireless AP. Does your radio card have to deal with a lot of other wireless users around you.
There are a few options that we can exercise to improve your performance, you can switch the 6205 to connect exclusively on the 5ghz band free from 2.4ghz saturation. Lets get those details hammered to see what else can be done.
Thanks,
Chase Valentine