Server request failed error while trying to connect to televantage server 7.0

I am am developing customize application using televantage SDK 7 and visual studio 2008. I am using client API to connect to external number from my VS 2008 web application. For that I have included TV object library 7.0 into the reference of my project and wrote a code to connect to external number.

Here is the code :
 Dim osession As New TeleVantage.Session
        osession.Logon("servername", "userid", "password", 91, tvApplicationTypeClient, "32044", , False)

It gives me the error : Server request failed

Here is the detail of error/exception I am getting while trying to connect to televantage server.
System.Runtime.InteropServices.COMException was unhandled by user code
  Message="Server request failed"
       at TeleVantage.SessionClass.Logon(String Server, String UserName, String Password, Int32 Station, TVApplicationType ApplicationType, Int32 ApplicationID, TVServerConnectionLevel ServerConnectionLevel, Boolean CheckVersions, TVStationUsage StationUsage)    at _Default.btnCall_Click(Object sender, EventArgs e) in C:\Documents and Settings\Administrator\Desktop\WebSite1\Default.aspx.vb:line 17    at System.Web.UI.WebControls.Button.OnClick(EventArgs e)    at System.Web.UI.WebControls.Button.RaisePostBackEvent(String eventArgument)    at System.Web.UI.WebControls.Button.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument)    at
System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument)    at System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData)    at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
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seju123Connect With a Mentor Author Commented:
The problem is resolved now. It was creating problem to connect to tv server as I was in different domain a/c and I did not have access to TV server's domain a/c. After adding access to the TV server's domain, I am able to login to the TV server successfully.
Amandeep Singh BhullarCommented:
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