Cablecard wont work

I recently purchased a cablecard for my Tivo. It took nearly two days to finally get it to connect. Now my channels come in for a few seconds and then a message pops up to contact cox. I have now called about six times and no one seems to know what to do besides send out a tech which will cost 60.00. Everything is connected properly so im really not interested in sending a tech. can you help?