ATC always give the smallest and shortest runway

I am wondering why ATC in FS9 always give me the shortest and smallest runway available for take-off. I fly the Boeing 737-700 myself. But although there are Boeing 747-400's present, everybody are directed to the smallest and shortest runway. Only that one is active. It feels stupid to stroll down that narrow path, while there is a wide boulevard right next to me.I know that I can change runway while requesting taxi, but I have to change every time. So is there a way to make ATC always choose the longest and biggest runway for me?Regards,Nico