Whatever you set on the vm itself in vCenter will be overwritten by the pool-setting in View unless you set it to "Manage using vSphere".
The most common problem with "Black Screen" is the 3 I listed in my first reply. Make sure that the correct video-driver etc is installed. (The one the the View Installer comes with)
If this still does not work, attach the view agent logfile here an we can dissect it and find the problem for you.
