some very important information is required that is not provided
what version of suse ? SELD 11 ( not free ), or openSUSE 11.4 or 11.3 ( free)
some guessing here
1)duel boot with windows 7
2) win7 has a "recovery" partition on sda1
3) you installed grub on top of the win7 recovery partition -- not good if you did.
4) a good bet
You reinstalled win 7 AFTER suse and overwrote the MBR
reinstall grub -- i am betting on that it is #4
http://en.opensuse.org/SDB:Repair_MB...indows_install
the opensuse wiki on GRUB
http://en.opensuse.org/GRUB