Oil Control Room - Play Button Stuck?

[Cat]

Hey everyone.

I can't seem to be able to click the Play button at all; I think I realized by now what I should do (and I even watched the storyboard solution) but the Play button won't do anything when I click on it.

Is this a bug or is there a way to make it functional?

I'm using Windows7

Thanks

By the way, this game is really, really awesome. I wish I'll get to do something like this someday.

[Cat]

Also I forgot to mention that the key used for opening the prison cells was left in my inventory after use. I wasn't sure whether this is a bug but now I know it is.

Anyhow I worked around this by loading an earlier save and going through the level again. After loading it again the key disappeared from my inventory after use and the play button worked normally.

[mopsgesicht]

maybe this thread will help you?
http://machinarium.net/forum/index.php/topic,506.0.html