If it works as root but not as a normal user then you have a permissions problem. When you plug in the USB-Blaster two new character files will appear with the following names:
- /dev/bus/usb/<busnum>/<devnum> (used by ACDS 11.0 on newer kernels)
- /proc/bus/usb/<busnum>/<devnum> (used by ACDS 10.1 and older)
If you have your udev rules right (or hotplug rules for older versions of Linux) then these devices should be readable and writable by all users.
If the devices aren't accessible by normal users then that is your problem.
ps. Please post OS and kernel version in future replies if you still can't get this to work.
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