Exchange 2013 CU2 upgrade to CU3 Failed at Front End Transport Service

Error:

The following error was generated when "$error.Clear();

         $feVdirName = "PowerShell (Default Web Site)";

         $beVdirName = "PowerShell (Exchange Back End)";

         $vdirName = "PowerShell";

         $InternalPowerShellUrl="http://" + $RoleFqdnOrName + "/powershell";

         get-PowerShellVirtualDirectory -ShowMailboxVirtualDirectories -server $RoleFqdnOrName -DomainController $RoleDomainController | where { $_.Name -eq $beVdirName -or $_.Name -eq $feVdirName } | remove-PowerShellVirtualDirectory -DomainController $RoleDomainController;

         new-PowerShellVirtualDirectory $vdirName -Role Mailbox -DomainController $RoleDomainController -BasicAuthentication:$false -WindowsAuthentication:$true -RequireSSL:$true -WebSiteName "Exchange Back End" -Path ($RoleInstallPath + "ClientAccess\PowerShell-Proxy");

         new-PowerShellVirtualDirectory $vdirName -Role Mailbox -InternalUrl $InternalPowerShellUrl -DomainController $RoleDomainController -BasicAuthentication:$false -WindowsAuthentication:$false -RequireSSL:$false -WebSiteName "Default Web Site" -AppPoolId "MSExchangePowerShellFrontEndAppPool";

       " was run: "The virtual directory 'PowerShell' already exists under 'server01.XXXXX.local/Exchange Back End'.

Parameter name: VirtualDirectoryName".

Thanks