HELP needed with dragon fish (violet goby)

Hi all. . . .

I desperately need help with my 7 inch dragon fish (i.e. violet goby.)
I purchased him from the pet store last week. The girl didn't know
much about them except that they are nocturnal and can thrive in
freshwater. Problem is, I can't get the guy to eat at all. I offer him
tubifex cubes (let them get mushy and sink to the bottom - won't eat
it when it is right in front of him), bloodworms, krill, shrimp
pellets, and feeder guppies during the day & at night. He just won't
eat anything. I am really worried because he looks kinda thin and it
has been a week since he has eaten. I called the pet store, and they
said to feed him frozen or freeze dried foods. Alot of help that was.
Temperature is 76 F, 50 gallon long tank, 7.2 pH, lots of live plants,
and a cave. HELP!


--Cookie