The SkyStar DVB-Cards officially supports only DiSEqC 1.0. For an 8in1 Switch you need software/drivers with support of Diseqc 1.1 (not only 1.0 and 1.2) to send commands to the uncommitted switch and then to the committed switches. Some users say that it work when you just select "None" in the Diseqc menu and add then all LNBs and set then the number of the uncomitted switch. But this never worked for me. Take al look at the Forum-Search with the "diseqc" keyword
For Skystar2 you can use the Software AltDVB (version 2.2) with the patched driver of from MiBi. Google will help you to find the files.
For the SkyStar HD you can use the TT WDM-Drivers and the wdm-devicefile from BxS. You will find it
here. But it seems that it only works WinXP.
And for the Skystar HD2: I don't know if the drivers for TT works for this card too.
I'm using a SkyStarHD (TT S2-3200 WDM) with DVBdream on 1 uncommitted and 3 committed Spaun-switches for 11 LNBs (28,2°E - 12,5°W).