Thumbnails from IsoDraw Images in Bridge CS6 are not shown

Hello community,

our Team uses for image search Adobe bridge CS6 and it is working fine. Every Isodraw file in Adobe bridge CS6 is showing as a thumbnail. Fine.

Now, we have new group members and they uses Isodraw also. Same version, same pc. But the image search in Adobe bridge CS6 is not working. Instead the thumbnail is the programm icon shown. In the attachment there are two screenshots. How can we solve the issue? Any ideas?

Regards