In my mind, it's your choice. There's no big difference between your, my or neither, just try to use consistent labeling.
Colleen Jones—Partner and Interactive Experience and Communication Consultant at threebrick; UXmatters columnist on Generating Ideas | Your Versus My in User Interfaces:
From a usability perspective, I have not seen much difference in task performance based on choosing your or my modifiers. [...] From a rhetorical perspective, I like including your or my modifiers for personal information to create a friendly tone.
A brand that has a personality that sounds like the product is a person, or speaks on behalf of a group of real people (like Flickr, which even says Hello to you), it makes sense to say "Your." But for brands that position themselves as an almost cybernetic extension of your personal infospace (like MySpace or Windows), "me" and "my" might actually make sense. In fact, consistency is probably the paramount rule here.
Yahoo! Design Pattern Library suggest to use your to label personal objects in social sites (Source: Your vs. My), but notes that my works fine for private, individual environments.