I undestand you, guys. My teacher says the same like johnmar... but I dont know,how :-D.
And...The cramps is strongly word, i think... eh, when i play faster solo for 40sec, I cant flex my finger fast, how I need... and sometimes the cramps will come...
I am 16 years old and i know, that i have a time for learning... but this problem is for me a big problem

I know, that practise for guitar exist ( for faster fingers, or exercises), so i wanted to ask, if the practise exists for piano

)
and
Dannyhule...How did you think, "you must know the layout of the music and let the music flow"
I havent understood, how did you think this ?
¨Thank you
