Thanks!
I'll try it! But I think that this means that I'll have to connect pins 0 and 1 from both together (the shield is now only connected via RST, GND, 5V pins 12 to 8 and 13 to 9 to the arduino). No biggie... jumper wires for the job!
Later I tell you what happened... 
Edit: It didn't work as well...
But I'm resigned. No big deal. I can always change it with the seeeduino everytime I want to update the soundtable or voice commands...
Thank for your willing to help all the time! I learned so much from here and the manuals!