VAGCOM-Radio & Navigation Modules: Too Many Com Errors

i was just wondering if anyone had encountered that kind of errors/problems before?

so i tried to code the Navigation and the Radio so that it would know the Nav had changed to the RNS-E, but i can't get in neither of the Controller windows... for both i get the same message as the one below...



when i run a scan this is what i get for both:

Address 37 (Navigation)
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Controller:
Note: Excessive Comm Errors

Address 56 (Radio)
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Controller:
Note: Excessive Comm Errors

Click to expand...

now since i had to remove the TMC box of the RNS-D and "bridge"/reconnect the CAN High and Low wires back to the way they came stock, i'm wondering if the problems could be coming from a wrong connection at that level...

or could it be coming from the CDC wires which i haven't yet removed from the stock black connector... but i haven't yet looked closely into this particular, and i'm even wondering if the adapter has any plugs, meaning the wires from the CDC don't actually feed into anything...

i plan on re-installing the stock Symphony II unit and see what happens after that, but like i said i just wanted to see if anyone had run into such problems before...

TIA!

note: i do get the Nav cluster screen, but right now it says at the bottom "No Map DVD" or something like that, and just display the compas as ">E<" or ">SW<" and so on... so even though i'm well aware the Avant isn't properly VAGed yet i'm kind of still wondering if i do have a working map DVD or not...
and i've got the same problem as everyone else, i need to quickly turn the Nav on and off to get the display in the cluster, although sometimes it just shows up... that's actually how i realised i was there, and no i had not turned the unit on and off before realising it was there...