Does the game play off line?
If it does then your problem is an internet connection issue.
If it doesn't then its a software/computer issue.
When you run pingplotter you should get something like this....

If you have an internet issue (game runs off line ok) you type in the address 71.252.137.154 to test to the game servers, or hitechcreations.com for login server. If the game loads up but when you click to go "on line" and it stalls then you are not hitting the hitechcreations.com server to get login authorized. If you get to the screen where the arenas are listed and then it stops you cant connect to the game server 71.252.137.154.
The more info, as in step by step of what you are doing and seeing will help people figure out what the issues you are having may be.