Sub-theme giving errors

I have Framework installed in /sites/all/themes/ and I started a child theme. The info file looks like this:

name = CustomTheme
description = Custom theme
base theme = Framework
package = Core
core = 7.x
engine = phptemplate
stylesheets[all][] = css/style.css
scripts[] = js/script.js

regions[sidebar_first]  = First Sidebar
regions[sidebar_second] = Second Sidebar
regions[header]         = Header
regions[highlighted]    = Highlighted
regions[content]        = Content
regions[navigation]     = Navigation
regions[help]           = Help
regions[footer]         = Footer
regions[page_top]       = Page top
regions[page_bottom]    = Page bottom

I'm getting error messages in the Admin > Appearance > Settings options in the child theme:

Notice: Undefined index: Framework in system_theme_settings() (line 556 of /home/drupal/modules/system/system.admin.inc).
Notice: Trying to get property of non-object in system_theme_settings() (line 556 of /home/drupal/modules/system/system.admin.inc).

I've setup a child theme before using another theme, with D7, but didn't have this issue. Any ideas?

Thanks much.