I have been off the bike for a few years due to shoulder, neck injury. Got back on and was riding hard with my SIDI shoes and Time ATAC pedals both of which I have always loved. Everything going great and feeling great for a few months till I started trying to do more technical stuff that was pretty scary and I just couldn't clip out fast enough to have the confidence to do some of the gnarly technical stuff, sooooo I thought I will switch to a set of flat Chesters while I get my technical skills/confidence back so I can just bail off easy. Anyhoo... that is not for discussion here, what is is that my knees expecially the front kneecap area hurts badly now that I am riding flats... any ideas why? It seems like it would be the other way around if I was riding clipless and my cleats weren't set right or something, but why would my knees hurt with flats? I am dumbfounded and about to say screwit and put my TIME ATAC pedals back on the bike... but sheeeeeeit am I crashing alot right now and would prefer to keep the flats for a few more months... all advice welcome! Thanks!