[Closed] Joplin Joy ( well not quite )

bit of a weird one this,re-filled my joplin with oil and now it wont go down(it took the correct amount of oil)investigating further I have found that the secondary chamber is not letting the oil go into it, confirmed it by taking the oil out, reassembling it and pressurising the chamber with air, then pressing the button on top the air pressure should drop as the secondary chamber opens but it doesn't.If you look up at the valve that opens the chamber and press the button on top it seems to be working,weird,need to get this one working so I can sell my other one.
anyone else had the same happen ? any ideas much appreciated.