What the Wiki say's is to pick up the shard in the Dwemer store room last.. but as you already have it... ick...
A fix for another problem...may work and is worth the effort to at least try.
* find a copy of The Aentherium Wars ( don't pick it up yet)
* drop all your shards one by one
* Read the book... see what happends ( may start right their may not )
* pick up each shard one by one... the first may start the Quest.
Good Luck...http://en.uesp.net/wiki/File:Fishystick.jpg