My AIM screename nicknames arent showing?

i have AIM 6.8. for every screename i have there's a nickname for each one. for ex. i have a friend & her screename is : heyyygurlies63095 & her nickname is Molly. but Molly isn't showing. instead, heyyygurlies63095 is. the nicknames were showing earlier but as soon as i made a new sn & i linked it to my old 1, the nicknames weren't showing anymore. ??? should i do? remember I have AIM 6.8. plz give me the steps to solve this!