Don't take my words as gospel truth here, I might be wrong or I might be just right on target; I remember something to the effect that the alcugs client, the one running Deep Island Shard is somewhat of old coding. Patching this code to solve the issue with Teledahn would break something else somewhere. I never completed the age of Teledahn the proper way on Deep Island in this incarnation or past incarnations when the shard was created (around mid July-beginning of August 2010).
The only way to finish Teledahn almost as planned is to use the command /spawn which will eventually bring your avatar in the room with the controls and 2 telescopes (where usually the bucket drops you off). Apart from that issue, I never encountered other issue elsewhere in the ages made by Cyan (URU:CC and MOULa added ages), at least that I can recall.
Teledahn is a loss if we cannot get past this.
I do agree if you try the right way, but try the /spawn method, it will work. It is a workaround.