VXML

I have a "Tell" Node setup to play Text to Speech for the current time, current date and balance information and in between that information, it's supposed to play a .wav file.  For some reason, it's not playing the .wav file.  It's playing the text-to-speech instead of the .wav file that I have selected.  The documentation says that it will only play text-to-speech if it cannot find the .wav file.  When using the IVR Play Task, it finds the .wav files just fine.  Is there a special path that I have to use when using the "Tell" task for playing .wav files?  Below are both the VXML Snippet and a snippet from the VOXEO logs.

VXML Snippet:

   <form id="TellStep_form">

        <block>

            <prompt count="1" bargein="false">

                <audio maxstale="0" src="Audio/ClosedLoop/prompt_1006.wav">

                    <voice>As of</voice>

                </audio>

                <voice>

                    <say-as interpret-as="time" format="hm">#{BDD/MyGlobalVars/currentTime}</say-as>

                </voice>

                <audio maxstale="0" src="Audio/ClosedLoop/prompt_1007.wav">

                    <voice>on</voice>

                </audio>

                <voice>

                    <say-as interpret-as="date" format="mdy">#{BDD/MyGlobalVars/currentDate}</say-as>

                </voice>

                <audio maxstale="0" src="Audio/ClosedLoop/prompt_1008.wav">

                    <voice>The available balance is</voice>

                </audio>

                <voice>

                    <say-as interpret-as="currency">#{BDD/MyGlobalVars/formattedBalance}</say-as>

                </voice>

            </prompt>

            <goto next="#StepAsk_form" fetchtimeout="30s"/>

        </block>

    </form>

Log Snippet from VOXEO:

11:51:57,016 - 66f5b1d687b9ec7feb48598a6c0c965c - Playing a prompt with bargein=false and timeout=5000

11:51:57,016 - 66f5b1d687b9ec7feb48598a6c0c965c - TTS: <voice xml:lang="en-US">CREDIT</voice><voice xml:lang="en-US">on</voice><voice xml:lang="en-US"><say-as interpret-as="date" format="mdy">07/29/2010</say-as></voice><voice xml:lang="en-US">In the amount of</voice><voice xml:lang="en-US"><say-as interpret-as="currency">$30.00</say-as></voice>