Cannot activate extension behind corporate firewall

Hello
I emailed customer support and was told to come here.

I am trying to activate my ecart extension, however I am behind a corporate firewall and proxy server. When I enter my activation key I get the error message of "Unable to connect to server" I have disabled my local firewall and anti-virus software to no avail. The link Technical Support request in the activation window goes to:
techsupportinsert_1.asp which has "Error The page you have requested cannot be found" Also the help button on the Online activation window does nothing on my machine.

Is there anywhere I can enter my proxy settings so I can activate the extension?

Thankyou

I have opened a backend ticket to get some information from you so we can generate a license file for you. You can check the ticket by logging in to your account on www.webassist.com and checking your support history.

Hi,

i have tried to activate my eCart 5.0.7 but i got the unable to connect message. I disabled antivirus program but still the same. My internet connection is through proxy and i do not know if that plays a role. Can you please suggest me what to do?

Thank you in advance.

see private message: