Carminat sat nav in 2003 renault laguna?

Hi all
I have a Laguna 2.2 estate the satalite and TMC were both red. I purchased a GPs antenna from ebay and connected it to the cd reader and the satalite is now green but the TMC light is still RED and I am about 15miles away from my destination. I have disconnected the GPS aerial from the roof should I reconnect it to get the TMC to light up or do I have another fault. Any help would be greatly appreciated.
Thanks
Gil