help! end button disconnects data

[the sandman]

I just upgraded my phone to Adrynalyns 6.1 rom and for some reason every time I PRESS, not hold, the end key instead of minimizing the program that I'm on it disconnects my data, which is really annoying because I always have the internet on or Windows Live connected. I dont know if it makes a difference but under Settings> Buttons > End Button, I have it selected to lock the device when I HOLD down the end button. I have no idea why it's doing this and I need it fixed. Any help will be much appreciated.