I have a Toshiba satellite L300 and its running vista my speakers work perfectly but when i plug headphones in i can hear no sound can anybody please help me out here?

Go to this link http://eu.computers.toshiba-europe.com/innovation/vista_drivers.jsp?macId=&LNG=5&mode=allMachines&userOS=&action=search&selCategory=2&selFamily=2&selSeries=178&selProduct=784&selShortMod=780&selOS=26&selType=42&country=all&language=13&search=

update your driver and then go to control panel, click the realtick sound, then go to advance setting then chose the best settings you want to configure young audio jack, in and out.