Which function gives out that error? I suppose the allocated bandwidth is to high. Take a look into the configuration software (MAX). How did you configured your camera (resolution, frames per second, bit depth)? Reduce e. g. fps, save the new settings and start you VI, again.
Or use a second 1394-Interface board (NI-8252 or 8254R) to expand the bandwidth.
Best regards,
Steffen Hoog