Im connecting to the server via a different wireless connection and can now see the tables in the database when I click on the Authenticate User server behaviour!
However, I was adding a Session Variable in the first behaviour with no problem, during the same process on the second behaviour, Dreamweaver crashed.
I reloaded Dreamweaver, and this time it crashed after pressing the OK button when selection the new session variable in the first behaviour.
I reloaded Dreamweaver and added my session variable to the first behaviour with no issue, with the second behaviour wizard open, I clicked the + to create a new session variable and it crashed again.
I reloaded again and this time managed to get it to work as expected.