If above doesn't work, try this. This is the last option upgrade.
1) Back up Wordpress MySQL DATABASE! 2) Delete all Wordpress files in directories, except "wp-content" folder & contents within that folder!!! --Once all set, wait about 15 minutes for GoDaddy to refresh-- 3) Setup new MySQL database for the new Wordpress you're about to install. 4) Reinstall Wordpress from scratch. Do not restore/import the MySQL Database yet! 5) Setup Wordpress options, (ie previous theme, update & activate plug-ins, PERMALINK SETTINGS) --Once all set, wait about 15 minutes for GoDaddy to refresh-- 6) Restore MySQL Database into the new database (step #3)