Yes it may, sfdisk is a partition tool. Did you modify your partition?

You should have a look at this tread:
http://talk.maemo.org/showthread.php?t=82655

I think you will find a solution for your issue.

Also i noticed you downloaded the same firmware as used in the N9 flash wiki. are you sure it is the correct one for your phone? Check your SIM tray for needed version.