"No service is hosted at the specified address" when accessing SB 1.1

Hi,

I've installed Service Bus for Windows Server 1.1 Preview on my Windows 8 Pro dev machine with SQL Express. My account is local administrator.

Although checking if a queue exists seems to work (at least, not generating any error), I got an exception when trying to create a queue, saying "No service is hosted at the specified address".

I believe my connection string is valid:
Endpoint=sb://additive/additive;StsEndpoint=https://additive:9355/additive;RuntimePort=9354;ManagementPort=9355;WindowsUsername=Thomas;WindowsDomain=additive;WindowsPassword=<MY_PASSWORD>

Any help would be appreciated.
Thanks
Thomas