Joomla Error - 500 Internal Server - Hosted On Yahoo?

Hi Friends, i am using joomla 1.5.
i hosted in yahoo
i am getting home page only if i click the link in the how page it showing error (Sorry, the page you requested was not found.
Additionally, a 500 Internal Server Error error was encountered while trying to use an Error Document to handle the request. )
Please [...]

Joomla Internal Server Error?

Hi,
I have just installed Joomla on my Windows Vista Home Premium SP1 computer. With the following programs:
IIS (Internet Information Services) 7
MySQL 5.1
PHP 5.2.8
and Joomla 1.58.
After spending hours watching tutorials on how to set the computer up for Joomla i was relieved when I finally saw the Installation webpage. All the ‘things’ it checks for initially [...]