Setting up point-to-site VPN certificates

I'm uploading my self-signed root certificate to the Azure virtual network with point-to-site enabled as described here:

http://msdn.microsoft.com/en-us/library/windowsazure/dn133792.aspx

However, each time I upload it says it has been uploaded successfully but the UI still says "certificate not set up". There's absolutely no further information available so I'm not sure where to go from here?

Thanks

James