custom sms ring tone help needed?

I have followed several tutorials and still can't figure out why a custom sms ring tone won't play on my iphone 3g?

Here's what I've done:

I have an iphone 3g and did update to 3.0 os and have the RedSnow 3.0 jailbreak installed!

In vista, I unchecked "hide extensions for known file types" in the control panel under folder options.

Using WavePad I converted an sms custom ring tone (6Sec in length) to .aif and then switched the file to sms-recieved2.caf (to replace the chime tone).

I used both winwcp and iPhonebrowser and put the file into the uisounds folder!

I did delete the original sms-recieved2.caf file(Chime Tone) as directed to in all the tutorials I have followed!

I previewed the custom sms tone in iphone browser and it played with no issues.

Unplugged my iphone from the usb and then opened the settings tab and chose sms alert tones and when selected the Chime tone there was no sound at all.

Is there something I am missing or not doing properly?

Please help.

did you just rename it from .aif to .caf or actually convert it?