WordPress MU

I have know tried to create blogs. After I created the blog and try to enter http://test.jokka.net/ appered an error message in my browser with the following:

"500 Internal Server Error
The server encountered an internal error or misconfiguration and was unable to complete your request.

Please contact the server administrator, support@one.com and inform them of the time the error occurred, and anything you might have done that may have caused the error.

More information about this error may be available in the server error log."

Soi contacted my host (www.one.com) and they toled me to change my .htaccess file into htaccess.txt. So i did!
But after that it appered a new error message that looked like this:

"404 Not Found
The requested URL / was not found on this server."

What should I do? My site is under http://www.jokka.net and test.jokka.net

"Soi contacted my host (www.one.com) and they toled me to change my .htaccess file into htaccess.txt. So i did!"

Change it back.

Ask them to enable wildcard subdomains on your account.

I have know talked with my host (one.com) and they say that their server dont supports wildcard subdomains..

But what if i change the options from creating site.domain.com to domain.com/site ? Will it work fine then? And.. Where do I change that? :)

Thanks andrea_r for the assistance!

Problem solved.

I deleted my MySQL database and deleted the wp-config.php file, entered my website name and innstalled the wordpress again since you cant edit that i was talking about in the post above.

Know the site works fine.

Whanks for your help again (: