VirtualBox 2.2.2 & 64bits (not working)

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Hello,

I updated to 2.2.2 from 2.1.4, my host is a windows xp 32bit (with an amd 720, 64bits and virtualization supported), guest fedora 64bits (latest kernel i think), was working fine.
I updated and virtualbox only gives critical errors when loading fedora, i thought...maybe something went wrong when updating...so i uninstalled virtualbox and deleted fedora (was only a testing box), i reinstalled virtualbox..and when trying to install fedora 64bits...same critical error again , virtualization is enabled, same hardware.
I tested with fedora 32bits, seems to work. Any idea? :/

I attach log file (error not explained), i'm a little newbie with virtualbox.

Thanks.

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Nobody has any clues? :/

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Same problem with debian 64bits , log added again, it was working fine before @.@
32 bits are working normally.