Fatal Error when trying to log in to admin panel

[lwhite]

Hello,

Our non-profit association has lost our CMS support and I am barely competent at managing our web pages. A friend helped us update to the latest version of CMS Made Simple (but one). Unfortunately, there seem to be some glitches. The page editor used to have a white background but after we updated it became the colour of our page borders (dark burgundy) and was barely legible. Turning wysiwyg off only confused me. I tried to change the admin page theme to OneEleven hoping the page editor background would be white again. In stead I now receive a fatal error message - Fatal error: Call to undefined method OneElevenTheme::SendHeaders() in /home/content/91/4021691/html/admin/header.php on line 40 -
when I try to log in to the admin page and now I can't do anything at all. I am terrified to go anywhere near the pho code and advertisements for competent tech support have produced no response. I am near despair.

[Rolf]

Hello,
The frontend of the site is working? What is the url?

Rolf

[lwhite]

Hello,

The site is still working. Our url is
http://www.mbgenealogy.com/

[Rolf]

Which WYSIWYG editor do you use? TinyMCE, MicroTiny or FCKEditor?
When you look into the admin under My Preferences >> My Account >> Tab User Preferences >> Content editor settings >> Select WYSIWYG to use.
If you can select another editor you can try it if that works.

Rolf