Importing AVCHD using FCE 4.01

I have a Sony HDR-SR12 Camcorder that produces AVCHD video (file extension .m2ts). I am having trouble to edit it's images on Final Cut Express 4.01.
After using the Log & Transfer tool, I get the files copied to my Mac Pro as a .mov files. The problem is that this files, when resumed, do not play properly. I get a very annoying pop (the image jumps every 1 second).

Does anybody have a clue on what is going on? Thanks a lot, I am nearly desperate...