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Are you sure the skulls you have are all Undead Eye Skulls? Gold skulls.
Those teleporters are just decorative.
The Reanimator will open those doors after you do his quests in order. So first you need to do the Skulls of Eyes quest and check how many you have--are they 15 gold skulls labeled Undead Eye Skulls.
There are hidden walls in the Swamp. Did you find them?
Don't talk to me is a general response that appears randomly in that type of creature.
In the dialogue section, what does he say to you?
I'll take those pathetic things. Now, I command you bring me 15 skulls of Undead Hounds. I'll open the gate.
Bring me exactly 15 Undead Eye skulls so I may reanimate them, unholy fetcher.
Is the quest still open in your quest log?
Can you put up a pic of what his dialogue is?
I think I see your problem. He won't talk to you unless you have the Undead Robes in your inventory. The Undead Apprentice near the entrance drops it. If you don't have the robes go to another level inn and try sleeping for 7 days and nights--21 hours. He should respawn. Of course, all the other monsters you killed will respawn too.