how to unlock radio?
 

hi everyone. i have a 93 es. the battery was dead a few months ago & when i got the new one the radio was locked. took it down to the dealer & they re set teh radio so it dosen't have a code. i never did put a code in after that. haven't driven the car in a few months & when i jumped it the radio doesn't work again. The red light is on and it says SEC in the display. I tried all the stuff in the manual but nothing works. does anyone know how to reset it? The dealer on my side of town wanted $120 to unlock it, while the one 50 miles away did it for free:) just don'w want to drive all the way down there.
thanks, veso