Kodi Kuri

Hi guys, I am not sure if this is the same as other people's issues but here goes. Everytime I log in to SL, I get to move around for about a minute-3 minutes before the game just logs me out and I get the good ol' "Darn..." message. I have researched this issue and some people say its a router issue, some say firewall, blah blah blah. I tried the solutions given in each case to no avail. I tried a different router, I tried port forwarding, I even tried using third party viewers, no luck. Any other suggestions?