RQM 4.0.1 Excel Importer Exception uploading test script

I have CLM 4.0.1 installed on Windows Server 2008 R2. Database is SQL Server 2008.

 When testers try to upload a document in RQM Excel Importer it gives error: Unhandled Exception has occurred in a component in your application. Please see below details of Just In Time (JIT) debugging. Please help, we need to get it resolved ASAP.

Thanks in advance
NP

************** Exception Text **************
System.ArgumentOutOfRangeException: Length cannot be less than zero.
Parameter name: length
at System.String.InternalSubStringWithChecks(Int32 startIndex, Int32 length, Boolean fAlwaysCopy)
at Mso2Rqm_Common.PreferenceStore.loadFromLines(String[] lines)
at Mso2Rqm_Common.PreferenceStore.load()
at Mso2Rqm_Common.ArtifactFactory.createArtifacts(String configFile, Workbook workbook, String sProjectName)
at RQMExcelExporter.ExcelExportRepositoryDialog.handleExportToRepository(Object sender, EventArgs e)
at System.Windows.Forms.Control.OnClick(EventArgs e)
at System.Windows.Forms.Button.OnClick(EventArgs e)
at System.Windows.Forms.Button.OnMouseUp(MouseEventArgs mevent)
at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
at System.Windows.Forms.Control.WndProc(Message& m)
at System.Windows.Forms.ButtonBase.WndProc(Message& m)
at System.Windows.Forms.Button.WndProc(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
************** Loaded Assemblies **************
mscorlib
Assembly Version: 2.0.0.0
Win32 Version: 2.0.50727.5477 (Win7SP1GDR.050727-5400)
Page 2 of 4
CodeBase: file:///C:/Windows/Microsoft.NET/Framework/v2.0.50727/mscorlib.dll
----------------------------------------
RQMExcelImporter
Assembly Version: 4.0.2.13264
Win32 Version: 4.0.2.13264
CodeBase: file:///C:/Program%20Files%20(x86)/IBM/RQMExcelImporter/RQMExcelImporter.dll
----------------------------------------
Extensibility
Assembly Version: 7.0.3300.0
Win32 Version: 7.00.9466
CodeBase: file:///C:/Windows/assembly/GAC/Extensibility/7.0.3300.0__b03f5f7f11d50a3a/Extensibility.dll
----------------------------------------
Mso2Rqm_Common
Assembly Version: 4.0.1.13262
Win32 Version: 4.0.1.*
CodeBase: file:///C:/Program%20Files%20(x86)/IBM/RQMExcelImporter/Mso2Rqm_Common.DLL
----------------------------------------
Microsoft.Office.Interop.Excel
Assembly Version: 14.0.0.0
Win32 Version: 14.0.4756.1000
CodeBase: file:///C:/Windows/assembly/GAC_MSIL/Microsoft.Office.Interop.Excel/14.0.0.0__71e9bce111e9429c/Microsoft.Office.Interop.Excel.dll
----------------------------------------
office
Assembly Version: 14.0.0.0
Page 3 of 4
Win32 Version: 14.0.4760.1000
CodeBase: file:///C:/Windows/assembly/GAC_MSIL/office/14.0.0.0__71e9bce111e9429c/office.dll
----------------------------------------
System
Assembly Version: 2.0.0.0
Win32 Version: 2.0.50727.5467 (Win7SP1GDR.050727-5400)
CodeBase: file:///C:/Windows/assembly/GAC_MSIL/System/2.0.0.0__b77a5c561934e089/System.dll
----------------------------------------
System.Windows.Forms
Assembly Version: 2.0.0.0
Win32 Version: 2.0.50727.5468 (Win7SP1GDR.050727-5400)
CodeBase: file:///C:/Windows/assembly/GAC_MSIL/System.Windows.Forms/2.0.0.0__b77a5c561934e089/System.Windows.Forms.dll
----------------------------------------
System.Drawing
Assembly Version: 2.0.0.0
Win32 Version: 2.0.50727.5467 (Win7SP1GDR.050727-5400)
CodeBase: file:///C:/Windows/assembly/GAC_MSIL/System.Drawing/2.0.0.0__b03f5f7f11d50a3a/System.Drawing.dll
----------------------------------------
System.Configuration
Assembly Version: 2.0.0.0
Win32 Version: 2.0.50727.5476 (Win7SP1GDR.050727-5400)
CodeBase: file:///C:/Windows/assembly/GAC_MSIL/System.Configuration/2.0.0.0__b03f5f7f11d50a3a/System.Configuration.dll
Page 4 of 4
----------------------------------------
System.Xml
Assembly Version: 2.0.0.0
Win32 Version: 2.0.50727.5476 (Win7SP1GDR.050727-5400)
CodeBase: file:///C:/Windows/assembly/GAC_MSIL/System.Xml/2.0.0.0__b77a5c561934e089/System.Xml.dll
----------------------------------------
System.Web
Assembly Version: 2.0.0.0
Win32 Version: 2.0.50727.5479 (Win7SP1GDR.050727-5400)
CodeBase: file:///C:/Windows/assembly/GAC_32/System.Web/2.0.0.0__b03f5f7f11d50a3a/System.Web.dll