Why can't i connect my pc to a hexapod controller via Tcp IP?

I am trying to control a hexapod via matlab from my windows pc. Matlab Driver and library files is provided by the hexapod company ehich i installed. Bit still this error is showing.

if(~exist('Controller','var')) Controller = PI_GCS_Controller(); end; if(~isa(Controller,'PI_GCS_Controller')) Controller = PI_GCS_Controller(); end

Loading PI_MATLAB_Driver_GCS2 ... PI_MATLAB_Driver_GCS2 loaded successfully. >> devicesTcpIp = Controller.EnumerateTCPIPDevicesAsArray(); disp([num2str(length(devicesTcpIp)), ' PI controllers were found on the network']); disp(devicesTcpIp); ??? Error using ==> PI_GCS_Controller.EnumerateTCPIPDevicesAsArray at 57 PI_EnumerateTCPIPDevicesAsArray not found

Error in ==> PI_GCS_Controller.subsref at 44 varargout{1} = feval(fun,c);