WCAT Log File

The log file is not recording the counters. I only intalled WCAT on the client side. Do I need  install WCAT in all the machines?

settings
{
   	clientfile     = "scenarios.ubr";
    server         = "someurl";
    clients        = 10;
    virtualclients = 100;
    counters
    {
		interval = 3; // times that will get the data from the counter
		counter = "\\Processor(_Total)\\% Processor Time";
        counter = "Processor(_Total)\\% Privileged Time";
        counter = "Processor(_Total)\\% User Time";
        counter = "Processor(_Total)\\Interrupts/sec";
        counter = "Memory\\Available KBytes";
        counter = "Process(w3wp)\\Working Set";
        counter = "System\\Context Switches/sec";
        counter = "System\\System Calls/sec";
        counter = "Web Service(_Total)\\Bytes Received/sec" ;
        counter = "Web Service(_Total)\\Bytes Sent/sec" ;
        counter = "Web Service(_Total)\\Connection Attempts/sec" ;
        counter = "Web Service(_Total)\\Get Requests/sec" ;
		counter = "Web Service(_Total)\\Post Requests/sec" ;
		host  = "someurl";
    }

    registry
    {
        path = "System\\CurrentControlSet\\Control\\FileSystem";
        name = "NtfsDisableLastAccessUpdate";
        type = REG_DWORD;
    }

    registry
    {
        path = "System\\CurrentControlSet\\Services\\Tcpip\\Parameters";
        name = "SynAttackProtect";
        type = REG_DWORD;
    }
}