I am getting an error on my site about the Fundraiser plugin

Hi,

When I have the Fundraiser plugin enabled, I get an error at the top of the page. See: http://screencast.com/t/kF4eVrN4D

I can highlight the error. See: http://screencast.com/t/ZioHFFs5Is

This is the error text:

t() [function.session-start]: open(/tmp/sess_5df20d6d57931e70a4e747e5857c2cfc, O_RDWR) failed: Permission denied (13) in /home/bdhhs/public_html/wp-content/plugins/fundraising/fundraiser.php on line 786

Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at /home/bdhhs/public_html/wp-content/plugins/fundraising/fundraiser.php:786) in /home/bdhhs/public_html/wp-content/plugins/fundraising/fundraiser.php on line 786

What do I need to do to fix this issue?

Cheers,

Dave