Ok Marius thanks. I solved the problem by downloading Finale 2008.
But while the program is running, it gets too slow and then makes the pc freeze. And it freezes at the start, with the very fisrt note i enter

. I have a Pentium 4 1,8 Ghz processor and 1 gb ram. Do you think it is enough to work fine at this system?
And also my Windows XP is getting a little bit tired i guess. It's not stable no more according to the first day i installed Windows.