Excel always crashes at the very same point of the code

[freakygreeneyes]

Hi community

I've still got some serious trouble with a Excel-document I'm working on. It's a file supposed to compare offers from various building firms. Thus I wrote a button-released code to sort the offers from cheapest to most expensive. I think the code should be all right by now, but every time I run it, excel crashes (with "runtime error 9: subscript out of range", when I press "debug", the program shuts down). By step by step running the code, I figured that it always crashes on line 14, no matter whats wirtten on this line. This made me think it might be a software-problem. But I tried running it on an other computer and had the same Problems. I also tried copy-paste into another file, but it didn't solve my problems neither
As attachment you will find the file. I'm sorry it's in German. The row to be sorted on is row 43.
I'm using windows 7 and ms-office 2010 professional plus. in case that helps ;-)

Thanks a lot for your help!
Greets
Freakygreeneyes