[Zope-CMF] Background color change problem?

[Ignacio Valdes]

Hello all,

I was trying to change the background color through the nouvelle
stylesheet by trying to customize it into custom, but I get a big error
when I simply hit customize and save, much less change any of the
colors:

Any solution? How would one change background colors if not by this
method?

-- IV

              Site Error

              An error was encountered while publishing this resource.

              KeyError

              Sorry, a site error occurred.

              Traceback (innermost last):
                File
/usr/local/zope/2-3-1/lib/python/ZPublisher/Publish.py, line 223, in
publish_module
                File
/usr/local/zope/2-3-1/lib/python/ZPublisher/Publish.py, line 187, in
publish
                File /usr/local/zope/2-3-1/lib/python/Zope/__init__.py,
line 221, in zpublisher_exception_hook
                  (Object: Traversable)
                File
/usr/local/zope/2-3-1/lib/python/ZPublisher/Publish.py, line 171, in
publish
                File
/usr/local/zope/2-3-1/lib/python/ZPublisher/mapply.py, line 160, in
mapply
                  (Object: index_html)
                File
/usr/local/zope/2-3-1/lib/python/ZPublisher/Publish.py, line 112, in
call_object
                  (Object: index_html)
                File /usr/local/zope/2-3-1/lib/python/OFS/DTMLMethod.py,
line 189, in __call__
                  (Object: index_html)
                File
/usr/local/zope/2-3-1/lib/python/DocumentTemplate/DT_String.py, line
538, in __call__
                  (Object: index_html)
                File
/usr/local/zope/2-3-1/lib/python/Products/CMFCore/FSDTMLMethod.py, line
213, in __call__
                  (Object: standard_html_header)
                File
/usr/local/zope/2-3-1/lib/python/DocumentTemplate/DT_String.py, line
538, in __call__
                  (Object: standard_html_header)
                File
/usr/local/zope/2-3-1/lib/python/Products/CMFCore/FSDTMLMethod.py, line
213, in __call__
                  (Object: css_inline_or_link)
                File
/usr/local/zope/2-3-1/lib/python/DocumentTemplate/DT_String.py, line
538, in __call__
                  (Object: css_inline_or_link)
                File
/usr/local/zope/2-3-1/lib/python/DocumentTemplate/DT_Let.py, line 147,
in render
                  (Object: ag="REQUEST.get('HTTP_USER_AGENT', '')"
do_inline_css="1"

sheet="stylesheet_properties.select_stylesheet_id")
                File
/usr/local/zope/2-3-1/lib/python/DocumentTemplate/DT_Util.py, line 334,
in eval
                  (Object: _[sheet])
                  (Info: sheet)
                File <string>, line 0, in ?
                File
/usr/local/zope/2-3-1/lib/python/DocumentTemplate/DT_Util.py, line 161,
in careful_getitem
              KeyError: nouvelle_stylesheet