Finding themes in Drupal 5.5

[rogerwebb]

All installed and present except that whatever address i put into the 'themes' address box in http://www.retiredandactive.org/admin/s ... hpfreechat>advance settings
it doesn't present me with any actual themes to select.

I am using the full site address

http://www.retiredandactive.org/modules ... at/themes/

But when I come to select a theme the drop-down box is empty

Can anyone advise?