Sounds like he doesn't like the cradle hold anymore. I would suggest to you to try another carry.
You have to constantly figure out what carry your child likes, and sometimes it changes... My DS loved the Front Wrap Cross Carry at that age. (Now at 11 months, he is too busy and wants to walk, play and see what is going on!)
Also, as Jroon said, keep trying. Maybe he just didn't want to be carried right then, but he will another time.
Good luck and don't give up! Try it another day and try new carries until you find what works for both you and your little one!