Send DOS command with VB.NET

Hi,

I'm trying to execute a DOS command, the "net use" command, but all my efforts worth nothing as of this day... I tried a process, the "Shell" function, the "ShellExecute" function... nothing woked. Sometimes the command is likely to work but it never returns when i put a "waitForExit" like statement. my lastest but meaningless effort is:

    Public Function createDrive() As Boolean
        Dim mapDriveProcess As Process
        Dim logicalDrives As Long
        Dim drive As String = Nothing
        Dim cpt As Long

        Try
            If Not File.Exists("C:\WINNT\SYSTEM32\net.exe") Then
                lblError.Text = "Could not locate drive mapping tool. Contact Patrick Poulin."
                Return False
            Else
                mapDriveProcess = New Process
                mapDriveProcess.StartInfo.FileName = "C:\WINNT\system32\cmd.exe"
                mapDriveProcess.StartInfo.Arguments = "/C net use B: \\alyson\public\webprod"
                mapDriveProcess.StartInfo.UseShellExecute = False
                'get the available drives to bound to
                logicalDrives = GetLogicalDrives
                For cpt = 0 To 25
                    If (logicalDrives And 2 ^ cpt) = 0 Then
                        drive = Chr(65 + cpt)
                        setDrive(drive + ":")
                        Exit For
                    End If
                Next cpt
                mapDriveProcess.Start()
                mapDriveProcess.WaitForExit()
                Return True
            End If
        Catch ex As Exception
            lblError.Text = "An error as occured during the binding process."
            Return False
        End Try
    End Function

this function never returns from the "mapDriveProcess.WaitForExit()" statement. I also tried:

mapDriveProcess.StartInfo.FileName = "C:\WINNT\system32\net.exe"
mapDriveProcess.StartInfo.Arguments = "net use B: \\alyson\public\webprod" ...

any help would be appreciated !
LeibNiZ