You really do not want to "up" the fuse level. Are you running the aftermarket wiring kit for the HIDs? They have their own relays and built in fusebreaker. You might have something not completely wired correctly to be blowing the fuses. Are you blowing the fuse in the fuse in the box in the engine bay's fuse box or are you blowing the fuse in the glove box?

And most importanly, how did you hook them up???