Apparently "Firefox can't find the server at www.malwarebytes.org." Same result with IE, and opera.
I get the same error on my laptop.
That's a bit worrisome - you may have some malware on the lappy, too.....
See if you can access it via Majorgeeks:
http://majorgeeks.com/Malwarebytes_Anti-Malware_Database_d6025.html
PP :)
EDIT:
Maybe a run of MBAM on laptop is warranted?