I had issues with quilt binding until I took a look at Marci Baker's method - you can view it online:
http://www.youtube.com/watch?v=Ot7Trk6J2Vw - this is the easiest method that I have had found and the results are super. On one of the quilt trips that I took there was a quilt instructor and she said that Marci Baker's method is the only one that she uses. Good luck - it is well worth the time to view the video.