keyless entry not working all the time in 2000 HT

So the keyless entry used not to work all the time so it visited a local friend at shop. he said that what was causing it was that the shift lever wasnt being pushed all the way forward into park and that was causing the computer to think the car was still in gear. Therefore it would beep and actually also not let the key out without a fight. anyone had this similar problem or heard about it. as i can see there isnt much popularity with this forum so any others that would be good to visit? Thanks