currently running OTRS version 3.1.10 and very happy with it!

Now they've asked me to get some bigger dashboard graphs.
So I'd started reading and managed to get the monthly/4 week stats graph installed.
Everybody happy, including me but not for long...

The next challenge: a year stat graph...
I've managed to get the code working but only the size of the graph is a problem. (see included images)
The graph is showing 365 days like we would it to be but the overal size of the graph is to small.
I've chaged the sizing in the Sysconfig to ContentLarge (see attachment) but still the graph remains small.
Any of you guys knows how to get this working?
Thnx!
Tim