Session Drummer 3 Steven Slate Sizzle Snare Not Loading

This seems to be getting progressively worse and my previous post is somehow lost here...

When Loading the drums into SD3, the sfz file looks for and loads wav files, yet all I can find are flac files. What's going on?

For no apparent reason, I get error messages when loading the sizzle drums. Always the snare. At first it didn't affect the playback of the song, but now in one piece, the message has STOPPED popping up and there simply is no snare.

Any ideas as to what might be going on? Any explanation for the file name confusion?

Much Thanks...
Keni