If you are sure that your net speed is fast enough, try to use other web browser. If you are IE user, try mozilla firefox or opera. Maybe switching a browser will do a trick
- Check if the site isn't blocked
- Clear out your history
- Use Another Broswer
- Make sure its the right port
- go to Tools>Internet Options then **** "Clear History", "Delete Files", "Delete Cookies"
- Run ZoneAlarm, then turn it off <----I use to have that problem
Look at the load of the server you are on, likely its really high and is limiting your performance. If its not the load, try resetting your internet connection.