hi if i have posted this in the wrong section sorry

I have a mk5 golf gti rep and it has a xenon hid conversion on there the only problem is that sometimes it plays up. when u turn it on the drivers light will come on then u flick back to side light and try again after a few tries both lights will light up. ( at time to time u will turn it on and drivers comes on then go to sidelights and back to main and the passengers side lights up but drivers doesn't.)
if anyone can help fix this or know why this is happening please let me know
cheers in advance
