Hello everybody, this is my first message here! I've just bought "Canon lens mount converter P" to be able to use some m42 lenses with my Canon AE-1 body. The body and mount are both in excellent condition and working. FD lenses (new and old silver ring type) always attach without any problem. So I was really surprised when I discovered I could'nt attach the converter. When I align the red dots it seems to snap into place, but it doesn't turn. I didn't use too much force, though, for obvious reasons. The converter looks used, but it's in good condition. It has "Made in Japan" written on it. Is it a known problem? What should I do? Any help appreciated.