Exchange 2010 Sp3 Installation on windows server 2008 R2 Mailbox Roles faild

rError:
The following error was generated when "$error.Clear();
            $InstallerScriptFileName = 'Scripts\ManageScheduledTask.ps1'
            $OneCopyScriptFileName = 'Scripts\CheckDatabaseRedundancy.ps1'
            $PsInstallerScriptPath = Join-Path $RoleInstallPath $InstallerScriptFileName
            $PsOneCopyScriptPath = Join-Path $RoleInstallPath $OneCopyScriptFileName
           
            & $PsInstallerScriptPath -RunFromSetup -Install -DeleteExisting -ServerName $RoleNetBIOSName -TaskName "Database One Copy Alert" -PsScriptPath $PsOneCopyScriptPath -PsScriptArgs "-MonitoringContext -ShowDetailedErrors -ErrorAction:Continue" -Verbose
        " was run: "Exception calling "GetFolder" with "1" argument(s): "This operation is supported only when you are connected to the server. (Exception from HRESULT: 0x800704E3)"".

Exception calling "GetFolder" with "1" argument(s): "This operation is supported only when you are connected to the server. (Exception from HRESULT: 0x800704E3)"

Exception has been thrown by the target of an invocation.

This operation is supported only when you are connected to the server. (Exception from HRESULT: 0x800704E3)