Your 'click here' leads to:
"Exploits Block List
The Spamhaus Exploits Block List (XBL) is a realtime database of IP addresses of hijacked PCs infected by illegal 3rd party exploits, including open proxies (HTTP, socks, AnalogX, wingate, etc), worms/viruses with built-in spam engines, and other types of trojan-horse exploits.
If your IP address is listed by the XBL, see the XBL FAQs for solutions"
""Information on this page is for ISPs and mail server administrators.
DNS-based Blocklists (DNSBLs) such as the Spamhaus XBL are designed only for use on mail servers.""
so without further details about your system I would start running your Antivirus, Malware & Spyware programs as it sounds as if your pc is infected and the server has blacklisted your IP address as it thinks you pose a risk of some sort.
I would make sure your pc is clean and then contact your ISP