got the bug to play again and dug my fluster out the other day after it sitting for about 6 years. changed the battery and put the tank on. as soon as i turned the the switch on it rattles off six shots. pull the trigger and nothing. turned the switch off and then on again and another six shots, pull the trigger and nothing. got the book out and the the switches are all off so it should be shooting in semi mode, no 3 or 6 shot bursts. anyone have any clue to whats goin on?