New Post: Problem Converting To GSM610

I've tried that and I can see the corresponding entry for the GSM format I'm trying to convert to:

===========================================
Format Tag 1: GSM 6.10
   Standard Format Count: 4
   Support Flags: Codec
   Format Tag: Gsm610, Format Size: 20
   Formats:
   ===========================================

.....

   Format 0: 8.000 kHz, Mono
      FormatTag: Gsm610, Support Flags: Codec
      WaveFormat: Gsm610 8000Hz Channels: 1 Bits: 0 Block Align: 65, AverageBytesPerSecond: 1625 (13.0 kbps), Extra Size: 2
   ===========================================

I'm running Windows 7 Pro, 32-bit.  If it makes any difference, I can save as GSM using GoldWave audio editor.