Problem Importing Heightmaps into CK

[hyperactivechild]

I have tried a couple of different tutorials on working a heightmap into the CK. Both were by creating the .esp with TESAnnwyn. I believe I followed the instructions correctly both times, but both times as I load the CK I get 'MASTERFILE: File 'tesannwyn.esp' is not a valid TES file.' error. The files itself has size. When loaded into TESVSnip, the file shows nothing. The .raw image i made is 8 bit, made from a tiff. I used the following code when using TESAnnwyn:

 

TESAnnwyn.exe -i Skyrim -p 1 -b 16 -d 4096x4096 -x -64 -y -64 -h -22192 -w Landtest *******.raw

 

* = filename

 

Anyone have any ideas?

 

Thanks,

 

Blak