Metro Prime Pinball DS card issue

I have this on my R4 (revolution) and i did the Arm7 replacement but whenever i still play it and press start it leads me to saying, "DS card removed, please power off the system" what am i doing wrong and what can be done to bypass this problem?Thank you

first r4ds ok get 1.19 firmware it works clean and dont patch rom

Make sure you have the latest firmware 1.18. http://www.linfoxdomain.com/ds/ Otherwise, use firmware from http://r4li.com/ or use YSMenu.