Error when getting song PlayPosition using Monogame

I'm trying to get the current time of a song when is playing, but when a call to MediaPlayer.PlayPosition.TotalMilliseconds; is made, an error is thrown:

An unhandled exception of type 'SharpDX.SharpDXException' occurred in SharpDX.dll

Additional information: 
    HRESULT: [0xC00D9C41], 
    Module: [Unknown], 
    ApiCode: [Unknown/Unknown], 
    Message: Unknown

I'm learning c# and monogame and maybe I'm commiting an obvious mistake.

The code that throw that error is this:

public static void SpawnArcker(GameTime gametime)
{
    if (MediaPlayer.State != MediaState.Playing) return;

    elapsedtime += (float) MediaPlayer.PlayPosition.TotalMilliseconds; // <--- HERE
    //elapsedtime += (float) gametime.ElapsedGameTime.TotalMilliseconds;
    ...
}

This is being called in the update method of the principal loop like this:

protected override void Update(GameTime gameTime)
{
    base.Update(gameTime);

    if (GamePad.GetState(PlayerIndex.One).Buttons.Back == ButtonState.Pressed || Keyboard.GetState().IsKeyDown(Keys.Escape))
        Exit();
    if (Keyboard.GetState().IsKeyDown(Keys.Space))
        MediaPlayer.Play(Media.song);
    SpawnArcker(gameTime);
    ...
}

I though it was because I was playing large .wav files, but the same happen with short .mp3 files.

So if someone is interested...

After a while, I found (I guess) the meaning of this error. In this page it says:

0xC00D9C41
#define MF_E_CLOCK_NO_TIME_SOURCE
No Presentation Time Source has been specified.

Then, I search for that error and found this where it says:

The presentation clock does not return a valid time until the Media Session sends the MESessionTopologyStatus event with the MF_TOPOSTATUS_READY flag. Until then, GetClock returns MF_E_CLOCK_NO_TIME_SOURCE.

(Emphasys added)

I guess is the fact that, even when the song is "Playing", there is no time yet to get, so this error is thrown.

Too much for me, so I opt to try a different library called NAudio with a similar functionality, so I reemplace everything related to MediaPlayer with this library and, with the same logic, now it works. This is some of the changes I made:

public static void SpawnArcker(WaveOutEvent waveOutDevice, Mp3FileReader audioFileReader)
{
    if (waveOutDevice.PlaybackState != PlaybackState.Playing) return;

    elapsedtime += (float) audioFileReader.CurrentTime.TotalMilliseconds - aux_elapsedtime;
    aux_elapsedtime = (float) audioFileReader.CurrentTime.TotalMilliseconds;
    //... rest of code...
}