Two keys mapped to same function doesn't work right ...

Whever I bind more than one key to the same fucntion it will only work for one key not the other.

Example :

the following in client/config.cs

moveMap.bind(keyboard, "w", moveforwardnormal);
moveMap.bind(keyboard, "up", moveforwardnormal);

will only run the function moveforwardnormal when the up arrow is pressed, not the w

why ?

thanks in advance - kevin