wyUpdate not Downloading client.wysAnswered

Hi I got the TSL/SSL issue since a few days, we've been using wyBuild & wyUpdate for quite some time now and till a couple of days it worked like a charm. Now i've made some tests and found out that the wyUpdate.exe generated by wyBuild 2.6.18.4 has a timestamp from 6th September 2012. When i found out about this i downloaded your source from github and compiled it, copied the wyupdate.exe i just compiled in my software and it worked again. If i use the “generated” one from wyBuild the Update process always fails. With the self compiled one it is working. Can you probably answer why this is the case or whats going on here? Btw i can download the .wys and all the update .exe files from our Server via Browser without any problem at all.