Airbag warning light.

Yesterday I changed one of the small light bulbs that
illuminates the speedometer. Quite an easy process,
just 3 screws and two connectors to disconnect.
Only trouble is that now, after remounting everything,
I have the red and yellow airbag warning lights on.
I checked connections again behind the dash-speedometer
and all is ok. Infact all lights work and turn off after check
control, but these two remain lit up.
I aslo checked the n°1 and n° 10 fuse (they're supposed to be
protecting the Airbag system) and they are both intact.
Anyone had a similar experience ? can somebody help me ?
Only thing I can point out is that it could be a different lamp power
(they come from my old AUDI 80!!) and could have probably
caused a higher current absorbtion damaging some other circuit.
Could it be ?

Thanks for any advice or help, Tony (Italy)