CSV import with subconnections

Hi,

I' am trying to import sessions with subconnections from a CSV file.

For testing purpurses, I've created two RDP connections with following names:

test (group)
--Computer 1 (session)
--------Computer 1 (subconnection)
--Computer 2 (session)
--------Computer 2 (subconnection)

Sessions Computer 1 and 2 are Microsoft Remote Desktop (RDP) and subsessions Computer 1 and 2 are Remote Assistance.

My export CSV file looks like this:

ConnectionType,ConnectionSubType,SubMode,Name,Group,Description,Expiration,Parent,Host,Port,CredentialUserName,CredentialDomain,CredentialPassword,OpenInConsole
Microsoft Remote Desktop (RDP),,0,Computer 1,test,,,,computer1,,,,,No
Remote Assistance,,0,Computer 1,,,,Computer 1,,,,,,
Microsoft Remote Desktop (RDP),,0,Computer 2,test,,,,computer2,,,,,No
Remote Assistance,,0,Computer 2,,,,Computer 2,,,,,,

When I try to import the thing back, an unexpected error occures. Log:

[26.6.2015 13:25:05]ERROR SILENT System.ArgumentException: Object of type 'System.String' cannot be converted to type 'Devolutions.RemoteDesktopManager.Business.Connection'.
at System.RuntimeType.TryChangeType(Object value, Binder binder, CultureInfo culture, Boolean needsSpecialCast)
at System.RuntimeType.CheckValue(Object value, Binder binder, CultureInfo culture, BindingFlags invokeAttr)
at System.Reflection.MethodBase.CheckArguments(Object[] parameters, Binder binder, BindingFlags invokeAttr, CultureInfo culture, Signature sig)
at System.Reflection.RuntimeMethodInfo.InvokeArgumentsCheck(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
at System.Reflection.RuntimePropertyInfo.SetValue(Object obj, Object value, BindingFlags invokeAttr, Binder binder, Object[] index, CultureInfo culture)
at System.Reflection.RuntimePropertyInfo.SetValue(Object obj, Object value, Object[] index)
at Devolutions.Utils.ReflectionUtils.SetPropertyValue(Object obj, String propertyName, Object value, Boolean allowNull)
at Devolutions.RemoteDesktopManager.Business.BusinessHelper.SetPropertyDirect(Object source, String containerName, String propertyName, Object value)
at Devolutions.RemoteDesktopManager.Business.CsvFormat.CsvImport.ImportFromCsv(String fileName, String rootFolder, Connection connectionTemplate, String& errorMessage, List`1 importCanditates)
at Devolutions.RemoteDesktopManager.Forms.FrmImportCsvWizard.ImportFromCsv(String fileName, String destGroup)

If Remote Assistance entries from CSV are deleted, import goes well. No subconnection gets imported, of course.

How do I construct my CSV file to do it right?