I replaced the original safety and installed a new low bolt safety on a mauser military 98 action. The new safety is designed to work with a scope. The original safety would rotate and lock the bolt back while cocked in the action. The new safety will not rotate and lock the bolt while it is cocked in the action. However, while pulling back the cocking lug while the bolt is out of the action, I can pull it back enough that the safety will rotate properly. I understand that it is a fit problem, I am just unsure what needs to be modified at this point. Don't want to do something I can't correct. Any help would be appreciated in advance.