SMC Communication issue

Hi,
I am working to operate the actuator LEHZ20k with the drive LECP6 drive. I have bought these from eBay, I don't have the exact communication cable which was designed by company but I am using Usb to Rj45 ( RS485) protocol which should be used as explained in datasheet, but The ACT controller software gives me error when I try to communicate.
Can any one guide me regarding this issue
 
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