Grenades revisted

Hi well im sure youve read my post on getting grenades to work in my game well ok...at first i got the nades to work in the engine without crashing say every 5 trys with some research on the error i managed to get the nades to work every time i hit g now when it comes to the second time i hit g i get a error "invalid packet" me being new to the engine and scripting i have no idea what this means can any one help ?