QUOTE (itsikw @ Aug 16 2006, 08:17 AM)

Hi,
I think I made some progress. When I tried and access the shop through FireFox, I noticed that the URL is secure.lumenlab.com. When I try to ping this host, I get an "unknown host" error (not even a request timed out).
This leads me to the conclusion that the problem is not in my firewall (and my Admin also bypassed my firewall for me), but in the DNS name resolution. Since the technician at the ISP could easily access the site, and I can't not from my office or my home, I think it might have something to do with the ISP.
Could you please tell me the IP, and I can try and add it manually to my lmhosts file?
Thanks
Name: secure.lumenlab.com
Address: 67.15.94.102
And it should go into the hosts file, not lmhosts.
It is very strange that your PC cannot resolve just that one name.