A question about connect PCIe-6321 with SCB-68A

I'm working on set up a pump in lab and I want to use NI to control the pump. Our group have done it several years ago but all of them have graduated. So I can't get any help. What I have is PCIe-6321 on a new computer and a SCB-68A connected with pump for controlling and data acquisition. I'm sure the line connected should be right because I just followed what our group previously used. When I run the program, an error - 1073807339 occurred at VISA read. The possible reason is VISA: (Hex 0xBFFF015) Timeout expired before operation completed. As I used VISA interactive control by commend *IDN?\n, read operation error occurred. It is the same 0xBFFF015 Timeout error. I think the main possible reason is there is some errors between the connection of PCIe-6321 and SCB-68A. I have checked the line for several times but it didn't work. Does anyone have some suggestion on how to solve this problem? Thank you.