how do we change root of a client view

I need to change root of my client view. I am trying to use ParseForms() to change this.

This is what I am doing.

 

 $p4->ParseForms();
 $p4->Connect() or die( "Failed to connect to Perforce Server" );

%client = $p4->FetchClient("SumanWin");
$client{'Root'} = "c:\\work12";
$p4->;SaveClient($client);

But this isn't working..

Please advise.

 

Thanks

Suman