SQL query always show 0.0000 when pulling the CPU usage in Percentage

I am using this query in different servers to pull the CPU usage and its showing accurate results,
only in one server it shows always 0.00000% sql CPU usage
any suggestions how can i resolve this issue
create proc CpuTimeInPercentageForNigeos

as
begin

DECLARE
@CPU_BUSY int
, @IDLE int

SELECT
@CPU_BUSY = @@CPU_BUSY
, @IDLE = @@IDLE

WAITFOR DELAY '000:00:01'

SELECT
(@@CPU_BUSY - @CPU_BUSY)/((@@IDLE - @IDLE + @@CPU_BUSY - @CPU_BUSY) *
1.00) *100 AS CPUBusyPct

end 
go

k