2002 Audi TT Question lights

Electrical problem
2002 Audi TT Question 6 cyl Four Wheel Drive Manual 70k miles

My right hand haed light has stopped working.
I got a new bulb & put it in. But it still did not work. So I took the bulb out of the left hand side head light. I put the new bulb in to the left hand light socket & it worked ok the I put the old light bulb in to it aswell it worked ok. So all bulbs are fine.

I think now its must be a fuse or wireing or maybe the computer.

Can you help me on this?