Are you logged in under an admin account on the box?
also what version of SCS are you running?
Here's my post on how to run the RCT tool - http://communities.intel.com/openport/blogs/proexpert/2008/04/03/remote-configuration-rctexe-how-tos Also there is a new version of it posted called the Activator which provides the same type of function.
On the vPro client - Do you have local admin access to execute the RCT.exe tool? Per your comment - sounds like the latest MEI\HECI driver was installed - was the LMS driver also installed?
The RCT.exe tool was recently updated to Intel vPro Activator Utility - available at http://www.intel.com/software/activator. That site also includes some user\administrator guides.
Per the command line and switches shown - you are trying to send hello packets while also synchronizing the FQDN of the client.
To initiate\send hello packets - Activator /s https://hpopenview.vprodemo.com/amtscs_rcfg /h /c
Other options\capabilities in the user docs are the Activator link above. Anything beyond sending hello packets and transitions to on (enabled AMT in the MEBx) requires a priviledge domain account to execute the command. The domain account is specified as a "Configuration Client" role in the SCS console.
Hope that helps