RasGetConnectStatus() not working

Hi everybody,
  Is there someone who can tell me why the RASGetConnectStatus() is not functioning and how to fixed this I like to get status of ras in order to maintain the connection until explicitly close by user. Also, the RasHangUp() also not working properly. Thanks in Advance.

[code]
private void ReconnectVPNRAS()
{
   while (this.CheckRasConnection(this.IDConnexionRAS) == false)
   {
 string connectName = this.txtIpAddress.Text;
 string user = this.txtUsername.Text;
 string pass = this.txtPassword.Text;
  
 this.OpenConnection(connectName,user,pass,"");
 Thread.Sleep(1000);
   }
}

public bool OpenConnection(string pNomConnection,string pUser,string pPassword,string pDomain)
{
   .....

   uint res = RasDial(0,null,TabParams,0,0,ref IDConnexionRAS);
   .....
}
[\code]

[code]
public bool GetRasConnectStatus(int idConn)
{   
   uint res = RasAPI.RasGetConnectStatus(idConn, ref status);
   if (res == 0)
   {
 status.rasconnstate = RASCONNSTATE.RASCS_Connected;
 return true;
   }
   else
   {
 status.rasconnstate = RASCONNSTATE.RASCS_Disconnected;
 return false;
   }
}

[DllImport("rasapi32.dll",CharSet=CharSet.Auto)]
public extern static uint RasGetConnectStatus(
 int pRasConn,  // handle to RAS connection of interest
 ref RASCONNSTATUS lprasconnstatus
 // buffer to receive status data
);
[\code]

denpsia