At&t Quickfire voicemail help!?

Ok so i have the At%26amp;t quickfire. i have already set up my voicemail and stuff. I made like a personal greeting or whatever its called. its been like that for a few months and i want to change it because i don't like it, and i cant figure out how. Please tell me how i can change my voicemail! thanks (:At%26amp;t Quickfire voicemail help!?call your voicemail, %26amp; listen to the options at the end!!!