iphone 4 password lock screen frozen keyboard

Hi, I have a jailbroken iphone 4 running 4.0.1 and I have been having issues with the lockscreen alphanumeric password keyboard not working. I would try to type something but nothing would happen, I can cancel it and I can still get to SB settings which I have installed and I can do a respring and that would sometimes fix it, but I do not want to have to always respring. So its only the keyboard that is not working. Some apps I have on are bitesms and lockinfo which are the only thing that interacts with the lockscreen. The bitesms quick reply keyboard works though. Also, you can tell that the keyboard is pixelated and not in high resolution, if that helps. If anyone has had this issue or know how to fix it, that would be great, Thanks

 

thought i'd give an update. It seems like the issue is gone now and hasn't occured for a while. Not sure if its because I restored and jailbroke my iphone on 4.2.1 or an updated version of lockinfo and bitesms. Either way it works great now =)