97 Golf radio problems

So I took my golf in to get it checked out. they unhooked the battery while looking at it. The thing is, my radio has that anti-theft device on it where if it loses power you need to enter that four digit code. I know how to enter the code. I didn't want to take it in to get it done. I heard that you can take the serial from the back of the radio and go to the dealer and they'll give you the code so you don't have to pay $100 for it to be done. Well, I unhooked the radio, hooked it back up, and now I can't even enter in the code. Every time I hold the SCAN and MODE button, it just blinks "SAFE" instead of letting me enter the code. I lost a couple screw along the way while unhooking everything. Could that be the problem? I don't see why it would. But any help would be greatly appreciated. Thanks

hmmm i think every screw's there for a reason :iceslolan
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vw golf accessory (http://www.aftermarketperformanceparts.com/vw-golf-accessory.html)

yup i had the same problem but if you still have the original maunels for it there is a manuel for the stereo that actually has the code in the inside cover :) hope you still have it it took me awhile to find m,ine but its there if u have the manuel