Spoiler extension problem

[Bobiam]

My spoiler only extends approximately 1" when manually raised. It operates nice and fast and you can hear it reaching the 1" extension.

I purchased the car 8 mo ago and it was stored for the winter....I have no idea if it operated properly above 75 mph last season, but I never noticed the red indicator light on the instrument cluster when above 75 (rarely done...had tires out of balance).

I reviewed the procedure for disassembly in my Bentley Manual, but thought I'd ask you guys for input before taking things apart.

Thanks,
Bob