Facebook API Error: Error validating access token: This may b

Hi all,
I have just installed JFBC on an existing site www.d-oneassociation.org/ and am having issues understanding how I keep the channel open so the Social Stream module always displays data to all users.
I have set up three channels linking Facebook groups into a Social Stream module. The user is an existing website user (me, as admin), and all works fine when I am logged in to everything. Logging out of Joomla seems to be OK, which I would expect.
But...if I log out of Facebook or just leave it inactive, then the channels stop working with the error:
Facebook API Error: Error validating access token: This may be because the user logged out or may be due to a system error.
Can you help explain how I am supposed to set this up?
Thanks
Giles

Hi Alex - thanks for the prompt reply, and at the weekend.
Since this is a live site it would be great if you can provide some code to past in. Otherwise I will have to revert to my previous Facebook feed extension, which is embarassing and yours offers much more functionality.
Then I will apply the new release when it is ready.
Look forward to hearing from you.
Giles

Hi Melissa,
I have applied your code changes and everything seems to be now working as expected.
Thanks again for very prompt and helpful response.
Regards,
Giles