Can't access secret menu on RNS510 Firmware 2720.

[sanj]

I've tried to set the value in VCDS to 1 when trying to code:-

- 37–Navigation, go into adaption and change channel 50 to 1 (will be 0).

I've done this but it come's up with an error saying it can't and does'nt allow me to save it,i've reset the unit and held the setup button for 20 second's and it come's up with the radio service menu but not the test menu.Anything i'm doing wrong?

[stealthwolf]

Where did you get the firmware from?

[sanj]

Where did you get the firmware from?

It was on the unit when I bought it!

[stealthwolf]

I remember hearing about some versions of the same firmware causing issues.

[sanj]

Oh I see,what firmware would you recommend and where do I get it from?It's a version'c' unit.