Using with non-root accounts

Hello to everyone,
I’ve been programming some tools to use a XEM3050 with a Scientific Linux CERN distribution (FC5).I always used a root account to compile/run my tools and everything went fine (my tools could see and use the fpga) but when I tried to run them with unpriviledged users the library does not seem to recognize the usb connection.
I get a -1 status error while trying to open the device (device->OpenBySerial() ).
I think the problem should be in the udev file.
I placed the file named 60-opalkelly.rules in the /etc/udev/rules.d/ directory
but maybe it should be modified to allow using the device by non-root accounts.

Can anyone tell me how to do this?

The udev rules file we provide grants permissions to all for the device. If this is not working your distro, you should contact the maintainers of that distribution for support.