stop immediatly on startup in virtual box f12 beta

[sheveroone]

I am trying to run fedora in virtual box.tried the new beta, strangely hangs immediately on starting ,writes this: "ISOLINUX 3.75 2009-04-16 ETCD copyright(c) 1994-2009 H. peter alvin et al"

in vista

:mad:

[bob]

(moved to F12 Alpha Beta)