The error occurs with all of them, I currently use:
Digital File Pro
Paypal ecom Toolkit
Tools for Google
Tools for Skype
All are at current vs.
I'm researching this issue at WineHQ which is the win compatibility layer for Linux.
A questions, if it's not to intrusive, are you using an SSL socket to send the validation request?
I suspect it's an SSL issue, because my terminal tells me it can't make a connection to your server when i push the send button, (yes I have a valid serial number in the box <G> before I hit send), the message in terminal is,
"fixme:wininet:NETCON_send not connected"
As I stated in my previous post another companies extensions validated online with no problem and Adobes flash based greeter is working as well (which coincidently uses SSL to connect to Adobe), so I know DW is getting online, any help is appreciated.