Sorry to bother you, I'm so embarrassed, I figured it out, the firewall of my W8 was silently blocking the cgminer 9.7.3 output... pretty lame of me XD

I remembered that happened with the cgminer 9.7.2 years ago... just using sgminer since them.

Yes, Skein it's very easy to start to mine, the fun now is with the tunning, but this is business as usual.

One question, my miners use the vardiff stratum and time to time they jump from 8 to 16 diff and then backwards to 8, do you recomend find out a fix diff 8 for better perfomance? Or just I left like that?

Thanks