How to fix my speedo on my renault megane 1.6 16v sport coupe 2000?

My Speedo does not work but yet the RPM, Fuel gauge and temp gauge does work.

I have tried replacing my Speedo sensor (located on the transmission/gearbox), this makes no difference at all.

I then went onto replace my Speedo and this also made no difference. So now i have no idea what else to do, does anyone else know?

Anyone else know how to fix this problem? Help NEEDED ASAP

PLEASE!!!