Error on Download Client setup

I am getting the following error when setting up download client.

Test was aborted due to an error: Object reference not set to an instance of an object

OS is Debian Wheezy, SABnzbd 0.6.05 and Nzb Drone 2.0.0.1861

I am on local port and input my API key from SAB. If i put an incorrect key SAB generates an error stating to use correct key. With correct key SAB generates no error.

In SAB I have created a TV catagory with the correct path and label, which I entered into Drone.

Below is my log from Drone.

Any ideas?

System.NullReferenceException: Object reference not set to an instance of an object
at NzbDrone.Core.Download.Clients.Sabnzbd.Sabnzbd+d__13.MoveNext () [0x00000] in :0
at System.Linq.Enumerable.First[SabnzbdCategory] (IEnumerable1 source, System.Func2 predicate, Fallback fallback) [0x00000] in :0
at System.Linq.Enumerable.FirstOrDefault[SabnzbdCategory] (IEnumerable1 source, System.Func2 predicate) [0x00000] in :0
at NzbDrone.Core.Download.Clients.Sabnzbd.Sabnzbd.TestCategory () [0x00000] in :0
at NzbDrone.Core.Download.Clients.Sabnzbd.Sabnzbd.Test (System.Collections.Generic.List1 failures) [0x00000] in <filename unknown>:0 at NzbDrone.Core.Download.DownloadClientBase1[NzbDrone.Core.Download.Clients.Sabnzbd.SabnzbdSettings].Test () [0x00000] in :0

You need to update Sab, 0.6.05 is too old for drone to support.