If you do not remember the root password this might be a problem but still you may fix it.
Power on your machine and when the GRUB screen shows up hit the esc key to stop the countdown timer. Then, on the default highlighted line, hit the e (edit) key and append to a line that looks like the following the keyword: single
linux /vmlinuz-2.6.38.6-26.rc1.fc15.x86_64 ro [...] rhgb quiet single
The line is actually much longer than the excerpt I pasted above.
When done appending the single keyword hit the F10 key (or ctrl+X combination) to start the boot process.
You should drop in to a root shell where you can easily change the root password using the command
passwd
Finally you can resume the normal boot process running the exit commanad (or ctrl+d combination).
Before resuming normal boot though you may change permissions to your home folder with the following command:
chown freedom:freedom /home/freedom
I supposed your username was freedom.
If that doesn't work you should probably apply the recursive option to the same command:
chown -R freedom:freedom /home/freedom
It is now time to resume the normal boot (run exit command or ctrl+d combination) and try to login to you box with your username and password.
