I hope U've sorted out Ur problem but here's the remedy in case U haven't. I had the same machine & was on the brink of giving it up until I checked the pump's dirt reservoir situated the front of the machine. It initially involves removing a plastic covering @ the bottom front end. There's a little screw which needs to be unscrewed then twist open the lever to hopefully expose Ur problem. Just clean & rinse out the machine several times & it should be good as new.
jhydo
December 2008