Why can't I see my sound file in FACE POSER?

[glHalfLife]

I have created a wav to play as dialogue, created the phoneme for it (without errors) but when I create a charactor, then create a Dialogue channel and then click WAV File..., my wav is not in the list. I tried adding a file called game_sound_tests.txt into the scripts folder in cstrike, which included the following:

"testing.123"
{
"channel" "CHAN_VOICE"
"volume" "0.850"
"pitch" "PITCH_NORM"
"soundlevel" "SNDLVL_NORM"
"wave" "tests/testing123.wav"
}

but that didn't change anything.

I am stuck, please help!