FST shows a warning message and plays an error sound when detects a failed close order.

FST resends close order at every 30 seconds until the warning message is closed or the position is closed.

The position can be also close manually.

But it`s crashing

Bug confirmed:

In ActionsDataFeed.cs line 728

/// <summary>
/// Manipulates additional params coming from MetaTrader. 
/// </summary>
private void ParseAndSetParametrs(string parameters)
{
    if(string.IsNullOrEmpty(parameters)) return;

    string[] splitParams = parameters.Split(new[] {';'});

    foreach (string param in splitParams)
    {
        string[] pair = param.Split(new[] {'='}, 2);
        string name = pair[0];
        string rowValue = pair[1];

        switch (name)
        {
            case "cl":
                Data.ConsecutiveLosses = int.Parse(rowValue);
                break;
            case "aSL":
                Data.ActivatedStopLoss = double.Parse(rowValue);
                break;
            case "aTP":
                Data.ActivatedTakeProfit = double.Parse(rowValue);
                break;
            case "al":
                Data.ClosedSLTPLots = double.Parse(rowValue);
                break;
        }
    }
}

All double.Parse(rowValue); must check for proper decimal separator before parsing.
Temporarily you can change your windows localisation to some that uses dot for decimal separator to workaround this issue.

But it`s crashing
Installed correctly, mt4 updated, fresh FST, demo strategy, connecting and got exception, more in link.
http://forexsb.com/forum/post/15458/#p15458

Where can I find new version?

Forex Strategy Trader v1.5.3.2 Beta on Download page.

And do you know what?
Of course - FST Log Viewer.

See more info and download link here: FST Log Viewer   

It works best with FST v1.5.3.1NB.

Changes: FST flushes the log files after each record.

Download link: [EDIT] Link removed. Newer version published.[/EDIT]

Download link of installation file: [EDIT]Removed. Newer version is available[/EDIT]

This version comes with option for automatic log to a file.
Option can be turned on/off from tools menu.
Log files are written in Logs folder under the installation folder of Forex Strategy Trader.
Installer changes the security permissions of Logs folder in order to make it available for writing under Windows ACL control.

Download link of installation file: [EDIT]Link removed. See for newer version below[/EDIT]
Changes:
  * Martingale Money Management integrated;
  * Expert detects and logs activation of Take Profit and Stop Loss;
  * FST shows activation of Take Profit and Stop Loss on Journal and on Chart.
  * Expert logs position parameters at the beginning of every bar.
  * Fixed issue with repeating wrong SL and TP from FST.
  * Included autostart feature proposed by Acerguest.
  * Added installing options to the installation file.