my xoops-based website tsl.lapulapucity.com won't display anymore. Instead of displaying the homepage, it displays a directory listing of the website. I forgot the XOOPS version i'm using but i'm sure its very old. How do i upgrade it to the latest version and to display it properly?

If you run a search on XOOPS version you are sure to find an answer to help you identify which XOOPS version you are running.

As far as display goes it could be any number of things. My inclination is to try the to turn on your php debug and see what is going on - can you access yoursite/admin.php?
if so you can turn on phpdebug.

Upgrade instructions are with the current stable release of xoops. If you version is older then you will need to go through a few more steps. I recently gave these out on a question about upgradeing from 2.0.9 - so I suggest once again you use search.

Just spotted this thread too.