Invalid

I participate in the Pampers Gifts to Grow program which basically you enter codes off the packages of diapers and after you accumulate so many points you get prizes.  I went to enter some today and it asked for some basic information such as gender, age and occupation.  Well, I typed "stay at home mom" in for occupation and when I hit enter to submit the information and it kicked it back to me saying the "occupation entered is invalid."  Thanks a lot Pampers, if a diaper company doesn't even recognize it as a valid occupation why should the rest of the world?!