How to set the sample rate of NI 9224 to high speed mode

Hello,everyone!Ihave a NI 9224,its maximum sample rate is 1KHz,and NI cRIO 9031.Then how to make NI 9224 run in the sample rate of 1KHz.The following picture is what I have did,but its sample the is about 2Hz,the actual looptime is 412317microsecond.What can I do  to get the maximum sample rate of NI 9224.I am really in great need of your help!Thank you!