I have had several users on x86 boxes that can not MAC Winbox into the units. If htere is no IP on them, we have to use a console cable.

Just a FYI, we have tried several laptops and desktops. Ensured all the basic stuff is done..
2.2.11 is on the website. I have tried 2.2.12 , and same thing.
Unchecked Load configuration
No firewall
no other network cards.

FYI

"can't"? any error messages or what? is it from a Vista ?

The same happens to me. The error, can´t load roteros.dll, using mac I get this error, using ip address works fine.

we are working on this issue