Help! This happened about a month ago, thought I had fixed it, but now it's back...

My digitizer is way off and it won't recallibrate. When I tap on the screen to reallign, it doesn't respond. I've tried both soft and hard reset.

I noticed that this happened right after I transferred some mp3s on my 64mb SD card and I was experiencing some hangs then after resetting a few times, digitizer became way off.

Any suggestions? I have seen a freeware program called "Digifix", does anyone have any experience with this program and if it would help my problem