Error Message...

I 'm getting this message when trying to use the "Modify Page" or "Commands"
menu;

While executing DWMenu_Commands_FormatTable canAcceptCommand in
FormatTable.html,
the following JavaScript error(s) occured.
At line 58 of file "C:\Program Files\ Macromedia\Dreamweaver
MX2004\Configuration\
Commands\Format Table.js":

TypeError: selObj has no properties

Can anyone HELP? Thanks in advance...