and its not comming out the burst valve the gold thing next to the cp reg?
mmm mybe jst not sitting rite,
failing that might be a idea to call smartparts in bexley.
I had a problem with my impy, and they sorted it out for me.
They might be able to tell you what it is straight away, as i know about cockers thn i do impys lol, even tho the impys are easyier to understand.
matt