Rocketmail Calendar not syncing

On May 1st, my rocketmail calendar decided to stop syncing with my iphone and ipad and vice versa in real time. What I did on the iPad did not get updated to the rocketmail.com account or updated to my iPhone.

I did some reasearch and Yahoo help said for iphone with OS that is a 5 and above, delete and add. I did, and now there is NO calendar that load up!

http://help.yahoo.com/kb/index?page=content&y=PROD_MAIL_ML&locale=en_US&id=SLN49 22&impressions=true

However, other YAHOO.com calendar works and sync just fine. I am not sure where went wrong. Could this due to the new update?

thanks ahead