just bought a Gumstix iron storn, Tobi and Robovero expansion boards, 
The gumstix was booting well under Tobi
the Robovero worked by itself (I checked at first without gumstix)
After everything looking good. I connected the gumstix. After 5sec. the wlan chip goes hot. I disconnect the power.  And try'd again on tobi, now it doesn't boot anymore.

So what do i do ?