Where is Nickelodeon Studios located?

I need to find Nickelodeon studios because i need to speak to the director of the show "Jimmy Neutron".

From Wikipedia, I found this, so Nickelodeon Studios is gone:
"Nickelodeon Studios (opened June 7, 1990 – closed April 30, 2005) was an operating television taping studio as well as an attraction at Universal Studios Florida. The studio will experience a revival of sorts, as Studio 23 and 24 are currently being used to program My Family's Got GUTS that premiered September 2008."

Source: http://en.wikipedia.org/wiki/Nickelodeon_Studios

I don't think that that place closed down. I think it is either somewhere in California of in Florida.

It's currently located in U.S. Florida according to:http://en.wikipedia.org/wiki/Nickelodeon_Studios