Hey i have a fender, classic player 50's strat, ive had it a few weeks and its my first times restringing it. It has gotoh locking tunes fitted and i cant get the strings on because when i try to screw the tuning head on with the string in it pulls back and wont stay tight.

what should i do???

Hmmm... I'm not sure about them, but they might be like mine. There's a hole in the middle of the tuner. you have to stick the tip of the string in there, bend it down into the groove, then tighten. But I'm not sure what you're talking about, pics of the tuners would help.