Greetings,i`ve just made it back from a great 2 hour session on the beach at Druridge, i was flying my 10m Bularoo on a 2008 Best Bar..it was launched on max depower and flown for most of the session that way also (first time in the air

) towards the end when my terror had mellowed to plain fear..i tried to power it up a little bit..pulling on the power up belt was simple enough but the belt kept slipping back to its Max depower setting..the bar is being flown without anything having been altered from its brand new state..what do i do to stop the belt slipping out to max depower?
cheers
Tim