Password change screws everything up

Until this morning, I had Advanced Poll successfully installed on my hosted site. After inserting a new poll into a webpage, I went into my admin area and changed my password from the default, which I'd forgotten to do when I first installed AP.

All of a sudden, none of the image files in my admin area will display and my Poll List is empty. On top of this, when I look at the webpage where my poll is posted, the "View Results" link and the word "Vote" in the submit button have disappeared. The poll, however, seems to still be functioning on some level.

Can anyone tell me what happened here--and how I might fix the problem?

Thanks.

I am also getting problems with the txtfile version when I change the default password.

I am also getting the following when trying to update general settings.

Warning: main(/var/www/ica.coop/htdocs/poll/lang/) [function.main]: failed to open stream: Success in /var/www/mydomain/htdocs/poll/admin/admin_settings.php on line 75

Fatal error: main() [function.require]: Failed opening required '/var/www/mydomain/htdocs/poll/lang/' (include_path='.:/usr/share/php4:/usr/share/php') in /var/www/ica.coop/htdocs/poll/admin/admin_settings.php on line 75