Ice problem

[Spartan_MC]

I was making a mod involving a dragoon shouting 2 shots that are homing instead of what it normally shouts, but before i finished it and made it into a .mpq i got back into online play on b.net. so just recently i got back into this mod and tried opening up the file and i typed in "protoss dragoon" as the header.then i went to the .grp preview tab and nothing was there. so i treid another unit and everything worked. my question is simply this: why cant i select the dragoon in ice?
-MC

[BSTRhino]

The most likely way that could've happened would be if you edited one of StarCraft's MPQs. Did you edit patch_rt.mpq, broodat.mpq or stardat.mpq?

[Spartan_MC]

No i saved it to a different file. I checked it again today and now nothing works..

-MC