Fatal Error when voting

When you click on the Vote button, it loads, then shows a Fatal Error similar to this:

Fatal error: Allowed memory size of 33554432 bytes exhausted (tried to allocate 122880 bytes) in /home/admin/public_html/wp-content/plugins/share-and-follow/share-and-follow.php on line 4244

The message changes every time I disable a plugin, another one shows in that message. I thought it was the share and follow plugin, disabled it, then SEO Ultimate showed in that message, and so-on.

Anyone know how to fix this?

thanks!