when i am trying to edit my profile

it gives me that the file called "users.class.php" is not found
i am using joomla 1.0.12

that file in joomla 1.5

what i must to do
[code:1]
Warning: main(/home/manhagn/public_html/mam/administrator/components/com_users/users.class.php) [function.main]: failed to open stream: No such file or directory in /home/manhagn/public_html/mam/components/com_fireboard/template/default/plugin/myprofile/myprofile.php on line 636

Fatal error: main() [function.require]: Failed opening required '......../administrator/components/com_users/users.class.php' (include_path='.:/usr/lib/php:/usr/local/lib/php') in ........./components/com_fireboard/template/default/plugin/myprofile/myprofile.php on line 636
[/code:1]

i solved it

i have to add some functions in "joomla.php"

thats all