I can't install Grub2 with Mageia 3 beta 2 usb-disk

[sonnet]

As per title while Installing Mageia 3 beta 2 on my pc, the Grub2 installation crashes.
How can I install Grub2 from live-usb?
I tried some guide but I get errors.

[M8R3t0f541]

I have been successful with installing grub2 from Mageia-3b2. Perhaps something is wrong with your disk?

[sonnet]

Maybe.. I'll try to create a new usb-disk

[sonnet]

I burned a dvd, and installed the dvd version (64bit).
When rebooting, after the installation ended with no errors, I get the message:
error: file 'boot/grub/i386-pc/normal.mod' not found

Which is the same error message I got yesterday when i tried to reinstall Grub from live usb-stick

[filip]

Did you check errata on this?

Maybe there is something in bugzilla that might help.