DraftSight keep telling me to activate

Hi!

I have been having troubles with my Draft Sight, i recently activated witouth a proxy, but the computer where it works is behaind a proxy and it keep telling me to activate it, so i think there is a problem with the conecction ¿?

I use Debian and Firefox.

What could i do to solve the problem?

Should i activate the DraftSight in every user?