Can't seem to find resource in own DLL, what am I missing?

See more:

C++

I am writing a shell extension for Windows Explorer. The resource loads perfectly if I drop the code into an exe and run it. But NOT in the DLL.
I have verified the resource is there (in both the copiled exe AND compiled dll).
The code segment (in GoAsm syntax) is; {error checking removed}

// Now find Header resource Block
invoke FindResource,[hInstance], BlankStream,8"STDATA"
cmp eax,NULL
je >>.failure

mov [hResource],eax

// Pull Resource into memory
invoke LoadResource,NULL,[hResource]
cmp eax,NULL
je >>.failure

mov [hHeader],eax

// Get a pointer to Resource
invoke LockResource,[hHeader]
cmp eax,NULL
je >>.failure

mov [pHeader], eax

Find Resource fails with "..resource type cannot be found in the image file."
The hInstance is the one passed in the DLLmain loda sequence. I have also tried using a pseuudo handle gotten from GetModuleHandleEx, and even tried loading the dll itself by doing a LoadLibrary call.

The resource file has

#define BlankStream 300
BlankStream STDATA Res\BlankStream.dat

And like I said, it IS THERE in the compiled dll and is correct, as far as I can tell.
Resource Hacker shows

STDATA
  300
    1033  [correct hex data]

Any ideas? Is it because the code is part of a COM routine? I am stumped <again>.