TinyTIFFWriter_RGBA Missing Alpha Channel

[CrazyCat22]

Hello, Im trying to write out an RGBA file. However, after writing the file and opening in photoshop I notice that it is missing the alpha channel. Only the RGB channels are present. Not sure why.

I open the writer using this:

TinyTIFFWriterFile* tif = TinyTIFFWriter_open( FileName.c_str(), 8, TinyTIFFWriter_UInt, 4, ImageWidth, ImageLength, TinyTIFFWriter_RGBA );

Thank you.