[Plugin: SlimBox2 for WordPress] error on page save

when this plugin is activated, and i try to save ANY page, I get this error:

Warning: DOMDocument::save(/home/madamex/public_html/nyc/wp-content/plugins/thydzik-slimbox2-slideshow/images.xml) [domdocument.save]: failed to open stream: No such file or directory in /home/madamex/public_html/nyc/wp-content/plugins/slimbox-2-slideshow/thydzik-slimbox2-slideshow.php on line 106

Warning: Cannot modify header information – headers already sent by (output started at /home/madamex/public_html/nyc/wp-content/plugins/slimbox-2-slideshow/thydzik-slimbox2-slideshow.php:106) in /home/madamex/public_html/nyc/wp-includes/pluggable.php on line 934

The pages seem to be saved, and the lightbox effect works, but I always get sent to an error page showing only that text.

I am using Nextgen gallery as well.

http://wordpress.org/extend/plugins/slimbox2-for-wordpress/