Make sure all your drivers are up to date. I have read that out of date motherboard drivers and others can set PB off. Also try this command "pb_static 1".

for the PB init problem go here CLICK HERE

I have same problem, sometimes it works great with no problems, I go somewhere for a few hours, come back, and then it wont work.
I went to my msconfig and noticed that only pb A is on there but not B.
Mabey its my router or something I dont know.
I tried the /pb_security and system 0, firewall, and all the other suggestions.
I just don't know, I hope someone comes up with a solution.

I have this problem that site linked is what I'm trying now, hopefully it will work :] I actually signed up to give the link to the DL but someone already did so I will check to see if it works. I'm not going to flame PB much but it could be so much better.. yeah that DL didn't work, PB can constantly kick me from every damn server by wouldn't recognize a hack if he shot them right between the bloody eyes ..