TMG 2010 publish ADFS 2.2 (server 2012 R2)

I was running a DC with server 2012 and ADFS 2.1 (server 2012) had an ADFS 2.1 Proxy

I published ADFS external via TMG with a web publishing rule, this worked great (no preauth by TMG).

Now i have a 2nd DC with server 2012 r2 and installed ADFS 2.2 (server 2012 r2) on it.
Now in the TMG adfs publishing rule i change the TO field to the ip of  the 2nd DC.

Now when i run the TEST RULE i get "64 - the specified network name is no longer available"