Both pins for front and back brakes are frozen. I'm new to Campy so I hope I'm doing something wrong or it's a quick fix here. But I've tried everything and I cannot get them to slide over to release the brakes. Is there something holding them in place maybe? They don't look rusted or worn or anything unusual. Heck, I just got them. I would like to fix them myself - or at least try before sending the bike to the shop.