At first sorry for my little English proficient way to explain my problem.

I have a plate-VSTA Asrock AM2NF6G 2 gigs of memory and ATI video though and installed OS X as you indicate I did not recognize USB devices when inserted, the keyboard and mouse yes, but the rest of the insert peripheral ahunque not before I have a boot error or something to add.
If possible you can tell me I have to do.
Regards and Thanks ..