Dora Tv & Dvd (by 3 users)

I bought the Dora tv 2 years ago and the Dvd player a year ago. I have not been able to hook the two up to work, I kept it because my baby wanted it so bad. I recently took the dvd player back to Walmart thinking it might just be bad, got another one and still would not work with tv. I went to Walmart and got another dvd player that was not Dora and still does not work. So I have come to the conclusion it was not the dvd player. I am confused here to why it is so hard to hook these products up and they are both dora products. If there is any help out there, please help me. I feel I have been cheated on these items that do not work together and the tv works with no other dvd players either.