I have had the spd mountain bike style cleats on my road bike for a week. Only fell once, so far..

I haven't gone too far with them yet, went out today and rode about 12 miles. My right knee is really hurting me. My knee wasn't bothering me too much while riding before I put on the clipless. I wasn't using cages either.

My right foot's natural position is splayed out. If I put my foot straight, it turns my knee in quite a bit. My left foot really doesn't do this. I'm thinking the pedal is holding my foot in a unnatural position for me?

Another issue with that knee is that I hurt my ACL in Nov. I didn't need surgery. It's not really 100% yet. I have to keep up on my exercises or it will bug me and feel weak.

I'm frustrated.. I really wanted to give clipless a try

Anyone else with duck feet or knee injures? Do you use clipless? Would a different style clipless help?

Thanks