Kings Quest VI problem, lower screen

[JaapR]

Hey, first of all thanks for ScummVM and it being available on Android.

However, as I'm playing Kings Quest 6 I got stuck. I got stuck at the entrance of the castle, where the two dogs stand guard. As I try to leave the palace entrance to the south, where the tree is located, it doesn't work, Prince Alexander of Daventry doesn't understand that being so close to the exit means exiting and not going exactly where I was pointing.
Am I doing something wrong? I kind of think the edge of my screen may be too unresponsive, but it could be that the screen is cropped too close to the edge?

I'm using an Snericsson Xperia X10 with Scumm 1.2.0

Thanks in advance, Jaap