T-Mobile Galaxy SII: Audio doesn't work with headphones

[Awa Sow]

So yesterday I tried to use my headphones on my samsung galaxy s2 but only one side worked. I assumed that the headphones didn't work so I bought new ones today. I tried the headphones again but one of the sides still didn't work. I tried using my mothers headphones but I was still experiencing the same problem. I decided to try using both my new headphones and my moms headphones on the computer and they work perfectly fine. Is there something wrong with my phone?