ok cheers for re-posting in English
I recommend the video tutorials
by Suro for getting to grips with the basics & setting up your interface.
So you have created your cursors & assigned the interface to the current/playable character?
if it's not something you've missed then it could be hardware related.
I myself have have some issues in which the mouse cursor won't show up unless I enable the "Force S3TC/FXT1 Texture Compression" - one of them fixes the mouse cursor issue at the cost of less smooth looking graphics.