I know this is the Moots forum and I'm asking a Dekerf related question but please hear me out!!!

I recently brought a ten year old Dekerf Team ST (the one with a soft tail rear end). As far as I can tell it has not been built up or ridden (judging by the imaculate paint around the dropouts), until last night. I had a quick test ride and found the shock to be odd. It moves barely a centimeter, is very notchy and tops out. Is this normal (I hope not), needing breaking in a bit more or is it broken? I was expecting it to be a little smoother in it's action. Does anyone have some top tips for getting to work?

Thanks in advance!