As I found the hard way, if you require queued channels to work in Indigo, then you need to install MSMQ Ver. 3.5 which is specially required for Indigo. Interestingly, the installer does not install this (for check that even MSMQ is installed), but then by design Indigo can use any kind of channel. This version of MSMQ provides functionalities like per-application dead letter queue and remote transactional read that are used by the “Indigo” queued channel on Windows Server 2003 and Windows XP. You can get the downloads from here . Below are the direct links:

Also make sure to get the COM+ hotfix and to get any of this working of course, you need the Indigo RC1 Beta - yes it is a release candidate for the beta, not a RC for RTM. Off to catch some zzzzz now.