Frequently Asked Questions For Upgrades I keep getting a Serial Number Invalid message when I try to upgrade on line. I just got my registration number for 3.0, and WinProxy keeps telling me Serial Number Invalid when I try to put the number in. I just upgraded to my new 3.0, but I can't get the NAT and Transparent Proxy to work. I keep getting a Serial Number Invalid message when I try to upgrade on line. These numbers are within the upgrade period, and those people do not need to purchase an upgrade to use version 3.0 unless they are changing the number of users.
People are mis-typing their serial number.
People are trying to upgrade LanProjekt s WinProxy 1.4. The problem with the switch-over is due primarily to the latency of DNS server changes. It can take several days for DNS changes to ripple through the Internet system and settle out to the new information. Your chances of getting caught 'in between varies from location to location and depends upon which ISP gives you DNS services. Things should have pretty much settled by the time you read this.