Hands together in Beethoven sonata op.27 no.1 (4th mov.)

[jgendron]

Hi everyone.
It might sound weird but I have serious trouble puting the hands together in some contexts. No problem with everything Waltz-ish or chords, but I have some when both hands are having runs at the same time (which happens a lot in this last mouvement of op.27 no.1.... and Bach works).

For example, at the begining of this fourth mouvement, we can see that the left hand goes on with a countinuous kind of scale in sixteenth notes and that the right hand joins the party on mesure 3, creating a motive in thirds. On mesure 9, left hand still goes on with the sixteenth notes but right hand finally calms down with simple eighth. I still have troubles with the left hand because it goes on and on...

I memorized both hands, worked on them separately but as soon as I try to put them together, it just won't work.  

Any suggestion ? I know I can try working on them with different rhythms, but the thing is : it doesn't only appear in this Beethoven Sonata, but every time I have a left hand run. Lol I'm weird

P.S.: Hope my english is not too bad