Hi, hope someone can help me (i feel a newbie.. and.. dumb)

i have sony hbh-600 bluetooth headset and wanted to make it work with yahoo messenger, i reinstalled the software of my bluetooth dongle (bluesoleil), and now the headset 's working fine and everything was working normally for like 3 days, i don't remember i made any other change and since yesterday i simply have no sound through the speakers, no sound from the USB microphone is recognized and i don't find how to fix it, it doesn't mark any hardware conflict and all the volume controls have the volume up, if i turn on the bluetooth headset, that works fine, but i want to use my USB mic and speakers for other things.

Could someone help me with this??? if it helps for something, i CAN listen windows sounds. i tried disactivating the option of "only use predetermined devices" and moving those audio options, but still no sound.

thank you very much.