NEMESIS,
Far too much missing info here.
How long have you had the program ?
Did it ever work ?
What is your Operating System ?
What Video card and card memory ?
How much pc memory ?
What type CPU and speed ?
What hardware accellerator settings are you using ?
We need as much info to go on as we can get.
Something else to consider:
If, after reading all the major improvements in version 2.124 over 2014, are you going to want to upgrade anyway ? Here's the link to product features.
http://www.mtu.com/support/hoster-versions.htm
If so, you might as well just go ahead and do it.
Take care,
George