Help with my first plugin: "Cannot find a PartModule of typename 'FirstMod'"

[nohelmet]

Thanks to the great tutorial on the wiki, I was able to write my first little KSP plugin. Except that I must have missed something, because it doesn't seem to work!

I can find my "new" part all right, put it on a vessel, and go to the launch pad. However,

when I look at the log, I don't see the "Hello, Kerbin" that should be there.

Here's what I see in the log instead (trying to put only the relevant parts):

[ModuleManager] compiling list of loaded mods...
Mod DLLs found:
  FirstMod v1.0.5478.33724
(...)
PartLoader: Compiling Part 'Squad/Parts/Utility/MyUselessPart/MyUselessPart/MyUselessPart'
Cannot find a PartModule of typename 'FirstMod'

and my cfg file looks like this:

name = MyUselessPart
(...)
MODULE
{
        name = FirstMod
(...)

I double-checked, and I am building for .Net 3.5, not 4 (I had to change it).

What is the error in the log trying to tell me?

edit: Oh, I figured it out - I put in the name of the dll in MODULE, but in fact it needs the name of the class that's in the dll. My bad!

Edited January 1, 2015 by nohelmet
figured it out