Thanks for your question.  

The activation code requires internet access to contact our license server for the initial registration process.

If you have a permanent activation code, but your computer does not permit internet access, I would suggest we generate a permanent Flexnet License key.  

We just need your computers' Ethernet Address (i.e HOSTID) to generate a Flexnet license key.  Here's how to get your HOSTID,

Once you have your HOSTID, fill out the following form and you will receive a permanent Flexnet license key that will run only on your computer (no internet is required). Here's the license request form link,

Note:  After receiving a permanent Flexnet License key, the Activation code will be disabled.