INSTALLATION PROBLEM WITH MODULES

[plasmedia]

gOOD MORNING TO EVERYBODY,

i don't speak english very well,

I installed oscommerce on my server, but i have a problem with modules (payment, total order etc..)

When a go to administation panel>modules>payment it appears this: Directory Moduli: /web/htdocs/www.reefland.it/includes/modules/payment/ and there is also an install button, but if i click over nothing happens..

So nobody can order through my site.

Can somebody help me?

If you need to know something about my configuration ask me!

Nicola