There are a few other things you could do. (copied from the post I referenced)
2. If you have access to your PHP.ini file, change the line in PHP.ini
If your line shows 32M try 64M:
memory_limit = 64M ; Maximum amount of memory a script may consume (64MB)
3. If you don't have access to PHP.ini try adding this to an .htaccess file:
php_value memory_limit 64M
4. Talk to your host.
I doubt you will need more memory than that, but you could give it a whirl. You can also ask your host what the max is. Keep in mind you probably don't want to set it to max if you have other sites on the same server. If you're still getting errors I would recommend contacting your host. Perhaps someone with more experience in this topic can provide help.