Problem with grub.cfg

Hi,

I got a little problem with GRUB2.

After upgrading my laptop (with UEFI) from F18 to F19 I reinstalled GRUB2 with:

The problem is that I can't update my grub.cfg . If i run:

It tells me that everything worked fine, but there are no changes in grub.cfg . I have checked the file permissions for root and they seem to be fine ->"rwx".

If I type:

The file will be updated and i can copy it to "/boot/grub2" but this can only be temporary solution for me.

I hope somebody can help me with this problem.