I posted this question before but so far I'm not able to make it work.
There's a little test page to explain my problem here:

[url]http://www.minuscuul.be/flash/[/url]

There are 3 buttons, one to move the block up, one to move the block
down and another one to move the block up and down. The last button
doesn't work. How can I fix this?

Thanks,
Diederik