Replying to Edge help

today when i was skiing i couldn't hold my edge on ice worth shit and i felt like my skis were coming out from under me and i also caught weird on rails. I was thinking that my problem is that my edges were so dull. I'm skiing on this years trouble maker 175s with 35ish days on them and have never had problems on ice like this before. I want to know what you guys think the problem is and if i should sharpen up my edges what bevel angle should i use.