Windows 7 - no sound on my right earphone

oh..jk..i go to cntrol panel -sound but i dont find headphones..it just have speaker and dgtal output..but there is no icon headphone..but still,i can hear from the left side of my earphone

Go ahead and click on Speakers, rather than headphones. I should have anticipated that in my last post.

k i do all what u told me..n i set the left n right both 100..but still just have one sound on my left side

Have you tried a System Restore to a point before the trouble started?

With the above, you can goto DM, disable the audio device, restart and re-enable it if it doesnt automatically and check. Stil not fixed?
Goto DM again, uninstall, restart and once the card gets detected, allows windows to select the right drivers and check.
If u dnt hv a driver CD with u, pls dont try the last method.

already done..but still no luck

i have no the old restore point..already delete it