air bags wont fill back up

this a 4-matic wagon, we took the rear suspension out and the bags,,,, now the the same bags wont fill back up . no sound, no pumps running. fronts goodwe took the rear susp out to replace a alum susp part that goes from wheel to wheel. the bags were fine ,,,we let air out to get-em out. now its all back in and the air -susp system makes no sound in the rear susp area. we may have a sm leak,, does that matter? also it was mentioned that it was jacked up for a while without the susp shut-off switch being off..