500 Internal Error after move to new hosting

Dear Friends,

Recently i moved my website from bluehost to hostmonster hosting provider. I know this is quite old version and before upgrade this to new one, i just thought of solving this issue…

My website is https://www.hotfriendsterlayouts.com/
but the core files are installed at https://hotfriendsterlayouts.com/layouts/

This is the error that i am seeing:-
_______________ERROR MESSAGE_______________________________
Additionally, a 500 Internal Server Error error was encountered while trying to use an ErrorDocument to handle the request.
———————————————————————–Apache/2.2.9 (Unix) mod_ssl/2.2.9 OpenSSL/0.9.8g DAV/2 mod_auth_passthrough/2.1 mod_bwlimited/1.4 FrontPage/5.0.2.2635 Server at hotfriendsterlayouts.com Port 80.
___________________________________________________________

Previously it was working fine in bluehost. I did everything as suggested by this forum ( including changing .htaccess permission ).

But if enter this address, https://hotfriendsterlayouts.com/index.htm it will go to static html page and redirected to the blog. But once inside the blog, whenever i click any links, it’s found to be broken.

I expect visitors to click https://hotfriendsterlayouts.com/ instead of https://hotfriendsterlayouts.com/index.htm when they surf. any solutions please?

Regards,
Darren.