GP kickstart problem

Evening all. I've got a GP150(SIL) which I've had for a few months. This morning I went to start it and for the first 2 kicks the kickstart returned to the starting position ok but when the engine started the kickstart would not return and was just hanging limp. I turned the engine off and was able to return the kickstart but as soon as the engine started again it wouldn't return. I'm not the most mechanically minded person so any help would be greatly appreciated. Cheers.