Help in Prince of Persia

Hey all I cant seem to get past the part at the begining where you have to run up a wall then jump to the other one.
when I do it he just slides down and then im stuck again. Please help.

I CANT GET ACROSS THE ______ WALL CANT YOU UNDERSTAND

I RUN UP WALL

PRESS A

NOTHING HAPPENS I END UP SLIDING DOWN

WHAT DO I DO AFTER I PRESS A?!??!?bam2000

I CANT GET ACROSS THE ______ WALL CANT YOU UNDERSTAND

I RUN UP WALL

PRESS A

NOTHING HAPPENS I END UP SLIDING DOWN

WHAT DO I DO AFTER I PRESS A?!??!?bam2000

[QUOTE="bam2000"]I CANT GET ACROSS THE ______ WALL CANT YOU UNDERSTAND

I RUN UP WALL

PRESS A

NOTHING HAPPENS I END UP SLIDING DOWN

WHAT DO I DO AFTER I PRESS A?!??!?forgot_it