LED Tail Lights

[BlackMamba]

Members. Just want to know your input on LED tail lights for an '03 X5 4.6is. I bought a pair online and tested them on the X. I didn't remove the original. I just unplugged the existing connector and plugged it on the LED tail light unit. The onboard computer kept lighting up saying "Check Rear Lights". When I try to brake, there are brake lights. When I turn on the parking lights, there are none. By the way, when I ordered it online, I specifically ordered an 2003 X5 tails. What I received the tails, box says for 1998-2002 LED tail lights. It's not even a 2003. Is it wise to change them tails? If so, how can it be done?
Muchas gracias!