interchanged sound problem

Hey, guyz. i have a HP pavilion dv6 entertainment pc, my speaker used to work before i started to use a headphone. suddenly it stopped working while i waz watching a movie using a headphone, dat waz d first occurence, but waz able to fix it. Later on it stopped working , but this time, when you test the headphone in control panel it sounds through the speaker and it plays through the headphone, when the speaker is set as default. I have tried every means i know, pls i need help. i dnt know how it happened

No, it doesnt play through both speaker and headphones, normally it plays through headphones alone, but when you test the headphones in {control panel-Hardware and sounds-manage audio devices} , it sounds through the speaker, and when the speaker is tested instead it sounds through the headphones, but the speaker is the default device, while the headphone is the default communication device(the headphone has microphone joined together). The last time, i just kept inserting and removing the speaker cord,in-case it was the jack, then used the sound troubleshooter, and it worked. I am nt sure if thats what maked it work any way. tanx, plz need help