2001 Jetta will turn over again and again, but wont stay on.
 

i recently had HID headlights put in, as well as an underglow kit installed on my 2001 Jetta 2.0. i got this done on tuesday, and tuesday night i turned off my car, walked into best buy, ten minutes later walked out and tryed starting my car. it turned over repeatedly, but it wont stay on. i replaced the alternator probably three months ago, and the baattery im pretty sure is good, since it continualy turns over.. it makes this really weird noise when i turn the key halfway, almost like an electronic feedback, and the lights on the dash board flicker.. liek the check engine, gas icon, etc.. please help!! im not sure how to use this forum yet, i just joined but please forward any helpful suggestions to my email.. jpnpga@gmail.com
i have a kid on the way and need this problem solved...
thanks to everyone
John Neilson
USCG