sharkone

Hi Fellow Simmers, Firstly sorry if this has been mentioned already...i checked forum but found nothing.I have found that the last few flights with this beaut of an aircraft that in flight i have had times where i need to deploy airbrake/spoiler, all within the required conditions i add and when i do it stays on, no matter what i try it will not come off. this has caused me to abandon some flights like todays EGKK to KJFK. I was 2 1/2 hours into a flight and had a tail wind/head wind/tail wind in quick succesion which kicked me very close to overspeed (fspax favourite as no doubt some have already found out : ).!! Has this happened to anyone else?? Any ideas would be great. I use FS9. Thanks in advance.