Speakers back panel

hello everyone !

im having this problem with my fairly new computer, my speakers work on the front panel, but when i insert the 3.5mm jack in the back panel it wont work.
in the realtek program im trying to change config. where it says

ANALOG
back panel

the jack is registered but i cant change it from line in to enything else , it sends error

playback/recording resource has been fully occupied!

can i even plug it in in the back or it must be in front ?

and here is the pic of back panel just for some more info.

2z7pcwl.jpg


and this is my pc

http://www.rshop.com.hr/index.php?route=product/product&product_id=87
 
Back