[leong124]

Initialise your variable first.

pawn Code:

new Text:yourtextdraw = Text:INVALID_TEXT_DRAW;

public OnGameModeInit()
{
    yourtextdraw = TextDrawCreate(...);
    //Some more
    return 1;
}

I got weird things when the variable is not initialised.
You'd better set the variable to Text:INVALID_TEXT_DRAW again after deleting it(especially when you will recreate it).