PI birthday problem
 

This seems to be a well trod theme but here goes. Im running PI 2, it was running happily with BBPIM in that when I entered a contact into BBPIM (the easiest way when a new number either recieved or dialled is turned into a contact) the field birthday has a date option....before ive done, what ive inadvertantly done, it would sync that number into PI but more/as importantly it would add that birthday into the PI calendar...simple.
Now, it doesnt sync automatically, I have to make sure to do it manually and the birthdays dont appear in PI as they did before.

Anyone tell me step by step the options in 'sync' on PI that would achieve and maintain what i had before....thanks in advance!