pxe kernel booting

[Vagner]

Hello!
I tryed to load a kernels of FreeBSD from 8.1 to 9.1 versions in memory throught Grub2pxe.  
The kernel which is less or equal 9.0 is loading well, but the kernel 9.1 gives me
different errors (for example: `error: address 0x94438 is out of range'). The kernel 9.2
gives me only reboot with boot throught Grub (before licence question
about copyrate).

Could you explain me a difference between this kernels in the boot section?
Thanks

-- 
Respectfully,
Stanislav Putrya
System administrator
FotoStrana.Ru Ltd.
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email: putrya[at]playform.ru
email: root.vagner[at]gmail.com
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site: fotostrana.ru

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