cs3 serial number

there is a serial number that is needed while installing adobe cs3 collection, but after the serial is put and the programe installed correctly, when opening any application in the cs3 collection like Illustrator or Photoshop or indesign, it still asks for a new serial number which is different from the one put at first.... can we try getting the serial keys for each or a general serial key that will not allow the program to ask for other serial numbers for each program....