HELP! Music playing from speaker while headphones is in.

[lilo5858]

i was listening to music with my headphones on my break while i was at work,and i didn't realized that the music was ALSO playing from the speaker as well,but i didn't find that out until one of my co-workers told me."so thats what u listen to?" LOL
so it was embarrassing!!..

does anyone has the same problem??
and can anybody help me with this problem?

I'm using EnergyRom Jan 14.
and i use the Sense 2.5 player.(in the music tab)