Can't stay connected

You probably need to change port settings to allow it. Typically you have to enter exceptions. Do you have a wireless router connected? Have you gone on World of War craft support site to see what ports need to be opened to play the game?

Then you can go to http://www.arrisi.com for info on adding port exceptions.

your computer simply may not be able to play world of warcraft anymore. you may need to splurge and buy a more game-intensive computer, or upgrade the video card. good brands to look for are anything ati and nvidia.

I would reset the router to default settings and use the good version of the firmware. OR delete your existing internet setup and then re-add it (do this if you didnt factory default your router before upgrading firmware)

In your World of Warcraft directory you have a cfg folder and in it a cfg file. This has all your video settings. You will need to optimize these settings for your display type. Start off in a very low resolution with all your effects disabled. Set any sound effects to 0 as well. Now start the game and go into options. Set the rendering range low and disable other options as you can.

Turn them on a few at a time until slowly until you find what is tripping up your video card.

try inspecting your telephone line, that goes with your router there could be some loose connection, ensure that all connection were tight and secure. if this does not solve your prob, check if you have the filter on your telephome line
cheers

Do you have video card installed in your motherboard?

If you have any do your have drivers installed for your video card?

If you do so pls check your settings for video and check foe the system requirements of World of Warcraft. Adjust your video setting to the specified recomendations found in the requirments for the game. System requirements located at the lower back part of your purchased cd.