I have downloaded the pmdg 737 ngx for flight simulator and been having a few problems. When I try to fly with the new planes it asks for an activation code that I have no idea where it should be located, I've tried multiple codes from my download but nothing seems to work. Some help would be greatly appreciated!

Have you tried this.............

 

Log into your PMDG account https://www.precisionmanuals.com/  Log in, Go to   View previous orders  Click on your order and your Key should be at the bottom of the page 

That seems to have worked, but now there is an activation error message even though I am connected to the internet.

That seems to have worked, but now there is an activation error message even though I am connected to the internet.

Submit a ticket to PMDG Product Support here: http://support.precisionmanuals.com

Since this is a user forum, this is best way to deal with product activation issues.

 

Reminder, full names on all posts in the PMDG forum.

it asks for an activation code

Page 19 of the NGX Introduction Manual tells you how to activate the product. Read it. When a product is purchased, PMDG sends an email that has the activation code. You must have deleted the email.

 

First and last names on all post are required on all PMDG Forums - http://www.avsim.com/topic/458101-guidelines-for-participation-in-the-pmdg-forum-please-read/.

I've tried multiple codes from my download but nothing seems to work

 

This has me  confused  you say you tried multiple codes,  there is only  one code  to enter  and that's your "key"  which can be  found  on  your view orders on the pmdg  account. Entering  other  codes  as you have  suggested  for  which  I  cant  see  where your  getting them from will not  work