Custom Press Not Working

This plugin doesn't seem to work and also note the following error under Role Capabilities Setting when creating the Custom Post Type:-

Warning: array_keys() [function.array-keys]: The first argument should be an array in /home/developm/public_html/wp-content/plugins/custompress/core/core.php on line 411

Warning: Invalid argument supplied for foreach() in /home/developm/public_html/wp-content/plugins/custompress/core/core.php on line 420

Also why can't Custom Post Types be created on individual sites rather than just via Network Admin?