Sounds not playing on VPS through cTrader

Hi all:

I have the below Indicator code.

It plays fine on my local laptop.

It won't play any sounds on the VPS through cTRader.

I can go into control Panel on the VPS, select the individual sound, and play it fine.

When cTrader comes up, it plays its normal starting sound, and any sounds whenever I get in/out of a position.

but none of these sounds will play. The associated text in red/green/yellow shows, so I know it's going through the method.

Any ideas why the sounds won't play on a VPS?

using cAlgo.API;

namespace cAlgo.Indicators
{
    [Indicator(IsOverlay = true, AccessRights = AccessRights.FullAccess)]
    public class Test : Indicator
    {
        [Parameter("Play sound", DefaultValue = true)]
        public bool PlaySound { get; set; }

        private int _prevIndex;

        protected override void Initialize()
        {
            _prevIndex = 0;
        }

        public override void Calculate(int index)
        {
            Chart.DrawText("Text", "Bar: " + index + ".", index, Bars.ClosePrices.Last(0), Color.Green);

            if (index > _prevIndex && IsLastBar)
            {
                if (PlaySound)
                {
                    Chart.DrawText("Text", "Playing Sounds.", index, Bars.ClosePrices.Last(0), Color.Red);
                    System.Media.SystemSounds.Question.Play();
                    System.Threading.Thread.Sleep(1000);
                    System.Media.SystemSounds.Exclamation.Play();
                    Chart.DrawText("Text", "Did you hear anything?", index, Bars.ClosePrices.Last(0), Color.Yellow);
                    System.Threading.Thread.Sleep(1000);
                }
                _prevIndex = index;
            }
        }
    }
}