Search function for restricted posts

I am trying to provide a search function to my members of the restricted pages.

I have tried several search plugins but all give the same result as the two included on the url above – the website thinks forever and never provides any results.

Can you please advise which search plugins or widgets work with your plugin and what if any particulars that i need to set up.

Thanks,
Leanne

The page I need help with: [log in to see the link]