Can some body help me on this?

Here is my code:

Dim qtApp ' Declare the Application object variable

'Create the QTP Application object
Set qtApp = CreateObject("QuickTest.Application")

'If QTP is notopen then open it
If qtApp.launched <> True then
End If

'Make the QuickTest application visible
qtApp.Visible = True

If Not qtApp.TDConnection.IsConnected Then
' Make changes in a test on Quality Center with version control
qtApp.TDConnection.Connect "xxxxx","xxxxxx","xxxxx","xxxxx","xxxxx",False
End If

'Make Sure about your script path and script name in QC

qtApp.Open "[QualityCenter] Root\\Regression Testing\Automation\test1\trial", True


'Close QTP

'Release Object
Set qtApp = Nothing

Am getting error in the "qtApp.Open ..." . Am not able to track why this is occuring?

Please let me know what should I do to resolve this?

My suspections are :
1. Is there error in the QC/ALM test path provided? or
2. I have version control enabled in QC/ALM. Is it related to permission control?

I have browsed several items, but could not get a proper solution.

Your help is really appreciated!!!