Increase number of concurrent shells in PowerShell V2

I'd like to increase number of concurrent shells in PowerShell V2.I tried using the following command开发者_JS百科 ,but I got no luck.The error I got is" Error: Invalid use of command line. Type "winrm -?" for help." Can someone shine some light?

winrm set winrm/config/winrs @{MaxShellsPerUser="50"}

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From an elevated PowerShell prompt execute:

Set-Item WSMan:\localhost\Shell\MaxShellsPerUser 50

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I'll just add to Keith's answer that you can find the command mentioned and much more in Administrator’s Guide to Windows PowerShell Remoting. It's worth reading!

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I can't activate winrm on my box, but according to MSDN, the syntax is:

winrm set winrm/config @{MaxShellsPerUser="50"}

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You missed the single quotes.

winrm set winrm/config/winrs '@{MaxShellsPerUser="50"}'