The BF is different each act, so you must find new keys.
Did you click on the BF key, and get the message 'you now have access to level x battlefields'? If you just picked the key up, you can click on it, then optionally drop it, since it is no longer needed.
In the first act, i could enter the BF, in the second act i have taken the for the BF of the second act (and clicked on it), but the problem is that if i try entering it, in the middle of the loading screen it stucks (and i have to close the game through the task manager). My brother's character doesnt have that problem although he is on the second act too.
Another problem i have is: in a current save game, i can take all the weapons (one handed and two handed) with a shield, the attack of all of the weapons is the same attack (i mean, that my damage doesnt change if i take another weapon), and all of my weapons get extra stats from intelligence (and my character is a warrier which has only 2 intelligence).
