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Jim,
Glad to hear you're doing better and welcome back to Xoops!!
There's a couple of things you can try and then it might help if you provide a little more information.
1) Clear ./templates_c directory (except for index.html)
2) Clear ./cache directory (except for index.html & adminmenu.php)
3) Make sure that both ./templates_c and ./cache directory are writable (chmod 777).
4) Turn on PHP debug (Admin>Preferences>General Settings) to see if there are any Warnings, etc.
If these don't help then perhaps you could provide us with a little more information like: PHP version, MySQL version, XOOPS Version, theme used, modules installed, any unique .htaccess settings...