I'm getting frustrated.

I have a .wav file I'd like to use as a ringtone on my Treo 600.
I converted it to a .pdb file using ringtonetools.exe program. I then uploaded the .pdb file using the install tool and hotsync. Log file says it uploaded o.k.
I've got pTunes, mRing and TreoGuard on the phone and none of them see the .pdb file. What am I doing wrong???

Thanks in advance for the help.