did a bit of digging, so far the only requirements that i'm seeing is this
Must be level 50+ (Requirement is inside of the zone table)
Must have
The Scepter of Shadows (requirement is in the door table ID: 8917)
i did check the recipes to make sure, but it looks like the recipe for making the scepter of shadows is correct, so that can't be it ether
went ahead and tested the whole quest on my own test server, and everything appears to be working fine...
could there be something that you've changed on your server?
"not experienced enough to pass through an interplanar portal message." is normally attributed to zone.flag_needed being set to something, by default its blank... i would check there