Twitter connect

Hello, i get the following message:

I dont know what to do now.. I got Joomla 1.7 and CB 1.7 with the latest Twitter function. My website is hosted at streetlegal-limburg.nl/portal

Help!

The provided callback url streetlegal-limburg.nl/portal/index.php is not authorized for the client registered to ' www.streetlegal-limburg.nl/portal/index.php '.

You are trying to login using Twitter at the site "streetlegal-limburg.nl" but you created your Twitter application for " www.streetlegal-limburg.nl ". Facebook and Twitter both do domain limiting and "streetlegal-limburg.nl" does NOT equal " www.streetlegal-limburg.nl ". Please re-configure your application and authorize a second URL for "streetlegal-limburg.nl". This is done by going to My applications > Your application > @Anywhere domains. From there you can add as many domains as you want.

how do you mean with second url? I only have 1 domain. streetlegal-limburg.nl

You have 1 domain, but you've 2 sub-domains; 1 with and 1 without www.; no idea why it became a standard to always append sub-domain www., but it's a second domain regardless. You need to authorize the 2 as seen below.

streetlegal-limburg.nl
www.streetlegal-limburg.nl

Please note if you're using Facebook it'll behave exactly the same so ensure it's configured in your Facebook application as well.

Another option is to create an htaccess redirect to send users from www.streetlegal-limburg.nl to streetlegal-limburg.nl.