Just looked at the audio handbook and it says if you have a Sony CD/6CD generation 2 unit, after entering the complete keycode press the preset button * to confirm, if however you have a different unit press the preset button 5 to confirm it , except the 1500RDS press the AM/FM button.
I hope this helps, Toes
Just had a look at the audio manual
As you have a code that includes 7, 8 or 9 you can't have a Generation 2 unit as there aren't buttons numbered 7, 8 or 9
thus once the "code" legend appears in the display try
using preset button1 press it till a 1 appears in the code, then
using preset button 2 press it repeatedly till an 8 appears then
using prest button 3 9 then
4 4 appears
and then press prest button 5 to confirm
Don't keep trying it too often or you may get problems later
Thanks very much for all your help,my wife just pointed out that i have been trying to enter the hex code then she showed me where the radio code is women are so much smarter then men (i feel a right arse)just have to wait 20 mins cause it locked me out the last time.