How it happens:

after driver installation / after apply driver settings

How to solve:
after reboot

• open Synway driver installation folder "C:\ShCti\"
• edit file "ShConfig.ini"
  find section "[BoardId=0]"
  add value "EnableDma=0"
• open "Device Manager"
  find Card and Update Drivers
  (card may be named 64bit, regardless to installation compilation)

In case motherboard is already known to give DMA error use following scenario:

• do not plug/plug out any Synway card
• install the driver
• power off, plug in the card
• power on, add "EnableDma=0", run ShCtiConfig.exe