v 1.9.1

I have this running as a cron job:

http://www.mysite.com/googlefroogle....y_tp&key=MYKEY

I receive this line in an email on execution of the cron job:
<p>Incorrect key supplied!</p>
I checked and double checked the key value in admin against the key parameter value in the cron job, and it's the same. I then changed the value on both to a new key, and I still get the error.