Crazy noises coming from below, and no drive...in the zook

Not good!!!
Had another box still attached to different engine, so pulled it apart to loot the clutch, fitted it..no noise....but still no drive! WTF!!
It is entirely possible that the clutch used was different, but it fit!
The donar was a 1.3 and 5speed combo from a coily, the existing was attached to 1.6 when bought, so i dont really know what size/sort etc etc this settup involves.
Is the replacement clutch (a) fitted incorrectly, (b) the wrong one..or is my box f%*(ed as well as the clutch?
Forgive my ignorance, Manuals are new to me!!!!
Cheers
