If you are a member and you cannot login or you face any problem after you login please follow the following steps to enable cookies.
1- Go to Start then click on control panel .
2- Double click on internet options .
3- You will see a window like the what you see in the picture below .
4- Click on privacy ( at the top of the window ) .
5- Drag the slider to the middle
6- Click ok ( look to the picture ) .
7- Close all the opened browsers .