Philip,
When you open the volume control box by double clicking the speaker, then click options and properties, look at the box below and scroll down the box that says "Show the following controls" and see if there isn't a box to click for line in at that location. Also, be sure the correct mixer divice has been selected as well. In my case it's ESS Allegro, but this varies with individual computers.
Then be sure that you have selected the recording properties. The line in does not display in the playback properties.
Hope this is of some assistance,
Gary
BTW--While I cannot speak Hebrew, I can still enjoy the music.
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PSR-S950, TC Helicon Harmony-M, Digitech VR, Samson Q7, Sennheiser E855, Custom Console, and lots of other silly stuff!
K+E=W (Knowledge Plus Experience = Wisdom.)