Datablock Scripting ?

Hi,

I'm trying to create an Explosion datablock object and cause an explosion at a specific location in script,
but when I execute the following code it sayes "myexplosion is not a member of GameBasedData"

//----------------------------------------------------------------------
%explosion = new Explosion() {
datablock = "myexplosion";
position = %this.getPosition();
};
//----------------------------------------------------------------------

I've defined the datablock and emitters like this

datablock ExplosionData(myexplosion)
{
soundProfile = MyExplosionSound;
lifeTimeMS = 1200;

// Volume particles
particleEmitter = MyExplosionFireEmitter;
particleDensity = 75;
particleRadius = 2;

etc...
etc...
};

I know how to do the syntax (I think), but I may be having trouble getting the scripting structure
correct ? I just copied the datablocks and emitters from fps.starter and just changed
the names.

Can someone help me ? I'm just trying to create the simple explosion object with the datablock
that is called on a schedule. I've looked at the fps.starter example, but I can't find what I'm doing wrong. (This is the first time I have tryed to do this as I'm new to Torque)

I may be leaving out some other function calls that are needed ? I don't know :(

What are the steps ?

Thanks,
Areal Person