I have CS3, installed from disks. Mine does not even have e-llicences on the Help menu.
It goes Registration, Activate, Deactivate, Updates..
Is yours part of a broader company multiple machine licence?
That is a multi seat licence version. If you bought it individually it is probably pirated and will not work.
Here is the box which was new/sealed when i received it:
I bought it from Amazon.co.uk website (Amazon seller) for £335.00
The software installs and works without any problem. The software asked for the serial number at install but there did not appear to be any online activation, but perhaps that is not required for all CS3 versions?.