Charactercontroller weird input lag.

hey guys, i had a simple movment script using charactercontroller, everything works fine on my current model for the player, i wanted to change the model for the player as it was not compatible with unity mecanim for a humanoid, the new one i was working on is, but when i use the the movment on that model the movment is laggy and weird, when i press W sometimes it will take a second or two for it to move. it moves at diffrent speed and all kinds of weird things, there are no error messages and all the required tags have been set on my new model. thanks