Franz Joseph

Can anyone tell me please if it is possible to visit Grossglockner in winter?
I have been there once before, but it was in September a few years back. I would like to visit the area where you can see the glacier (I think it was called Franz-Joseph Glacier, Maybe?), however, this time I will be in Austria in early February?
Will I be able to access the viewing area at this time? If so, will I be able to drive my vehicle (4WD) to the viewing area, or will I need to go with a tour company?
Thanks for your help
On the official web site they say the road will probably be open until end of october, and it was opened 28 april this year.
http://www.grossglockner.com/service/
So I suppose you will have no chance at all going there in february, neither by your own 4WD nor by a bus tour.
Emperor Francis Joseph of Austria Greeted by His People