problems visualizing particle effects

Hi, we recently bought the three torque engines, so I'm reading the TGB documentation and following the tutorials and met some problems on the firsts tutorials

I'm trying to make the mounting tutorial but I'm having some problems with the particle effects, in fact, I can't see no particle effects except for wormhole and gglogo, the rests are just a blank square

when I put the mouse over the effect on the create panel it shows the source directory and I realize the particle effect is in that path

when I run the game I check the log and the only error I find is this

t2dParticleEmitter::setImageMap() - t2dImageMapDatablock Datablock is invalid! (raindropImageMap)

but when I search for some thing called raindropImagemap, a file or inside the files of TutorialBase folder I don't find anything

I've looked all over the forums and haven't found an answer, I opened the rain.eff file with a text editor and looked for raindropImageMap and found it, but in the tgb editor I can't see no reference to this, I'm having the same problem with most of the particles

thanks