CSS question around clickable background logo

I run the site: http://www.xhotels.net

This is based on an affiliates program with hotelscombined.com. Once you select your destination and dates, you get redirected to:

http://hotels.xhotels.net/SearchResults.aspx?destination=city%3aParis&checkin=2012-12-26&checkout=2012-12-29&Adults=1&Rooms=1

As you will see, the landing pages looks very similar to the main wordpress site. However, I am stuck with the logo not being clickable. I am just starting to get my head around css, and although the logo has a “a href” tag, it can’t be clicked. I would wan that logo in the top left to point to: http://www.xhotels.net Can I ask you for help with this one?

Thanks so much!