Pre-Authentication with WPA.

[roby]

Hello everybody, 

  I need your help..... Do anybody know if Pre-Authentication can work with 
WPA? 

  I have a small net with 2 APs based on Hostap. I'm using a 802.1x 
authentication system based on EAP-TLS and the authentication works fine. Do 
someone know how I have to set hostapd for make the pre-authentication 
works? 

Thanks for your kindness,
Regards
Roby.