There are some days I try to solve this problem .....
I did several installations of Das-Xentry is 9-2010 is 11-2010,
I solved all the various errors that I found with the various fixes in the forum that you have developed, I tried to change key is das xentry both developers and normal ,I also fixed a problem with my Blacklist multiplexer.....
But I can not solve this news' that happens...
Launch xentry connected to the multiplexer connected to the battery everything goes without error and regularly with various cars with either diagnosis Das or Xentry Diagnostic but when I close all applications my Xentry registration key is deleted....
Rewrite the key, and continue this indefinitely ...

Thanks.
Luca