Blackberry Curve 8520

About a month ago we had to download a new app. I can not download on my 8520 Sirius said it had a problem but is fixed. I can not download the app on my or my wifes phone. It gets halfway through and says 907 invalid COD. Sirius won't help they just send me the link again and says it is fixed. They told me to call blackberry I took it in everything is fine on the blackberry side and they say it is an app problem. Any one been able to download to an 8520 or any help on how to fix?