'Save plugin settings' button not working, sending me to General Settings page

Hello –
I am trying to use the ‘1-Click Retweet/Share/Like’ plugin to add Twitter and FB buttons to my posts. It is working and appears on the site when activated. When I go into the plugin settings (to get rid of other default buttons etc), I can make changes there, but when I hit the ‘save changes’ button at the bottom, I am sent to the general settings page at
wp-admin/options-general.php
— and the changes are not saved.

So, I’m stuck with the default plugin settings, which isn’t much good to me. I also remember that this has happened before with some other plugin(s), but I just assumed that it was a problem with the plugin itself and deleted it.

Can anyone help??

Shaun