Storage Discovery scope is greyed out - VMM 2012 SP1

When you try to add a storage device to VMM 2012/2012 Sp1, you cannot get past the ‘Specify Discovery Scope’ screen.

You will by default have protocol SMI-S CIMXML, but are unable to change this as well as the TCP/IP port, which is currently locked at 5989.

The options to change one of these, are greyed out.

To fix this, please remove the following KB:

http://support.microsoft.com/kb/2840642