iostat.sh is not returning any result to Splunk.

[admin12345678]

Hi,

I am using Splunk add on for Unix and Linux to get my CPU and iostat data of my hosts. Everything is working fine but only iostat data is not coming.

[script://./bin/iostat.sh]
interval = 60
sourcetype = iostat
source = iostat                                                                                                                                                                                            index = linux
disabled = 0

and I have already installed sysstat package.