My clutch adjuster was stuck too. I took everything apart, cleaned it, lubed it, and put it all back together. Careful not to lose the ball that sits behind the adjuster. As far as being able to shift, are you sure you've got the cable on right? I had the same problem and read some posts here on putting a new clutch cable on and realized I had it wrong. I can't remember the exact procedure, but try a search.
Also, you mentioned you had the manual, which is great. If you already have it, I recommend downloading the parts fiche. There are exploded views of everything, more I think than what the manual has.
Good luck!