With Crazyscan running, in the logfile (Streamreader text), what do you have after PLSSe 0x08? (that's where you select root 8). I don't suppose you have MISSel at all?
20:08:36 StartDVBEx(0)
20:08:36 Device_ID: 0
20:08:36 Use Device 0
20:08:36 Tuner filter: TBS 6925 DVBS/S2 Tuner
20:08:36 Capture filter: TBS 6925 BDA Digital Capture DVBS
20:08:36 Tuner IC: STB6100
20:08:36 Frontend/demod IC: STV090X (cut 3.0)
20:08:36 Current stream mode: TS=1, GS=0
20:08:36 TBS STB6100/STV090X direct control used !
20:08:36 BBGain = 8 dB
20:08:36 Turbosight (SAA7160 based) BDA extension used !
20:08:36 + Turbosight BlindScan support with STV090X
20:08:36 + Turbosight IR control support
20:08:36 + Turbosight I2C access support
20:08:36 + Turbosight fast LNB control support
20:09:08 MISSel(0,0x00,0x00)
20:09:08 PLSSel(0,0x08)
20:09:21 MISSel(0,0x00,0x00)
20:09:21 PLSSel(0,0x08)
20:09:30 MISSel(0,0x00,0x00)
20:09:30 PLSSel(0,0x08)
20:09:50 MISSel(0,0x00,0x00)
20:09:50 PLSSel(0,0x08)
20:12:33 MISSel(0,0x00,0x00)
20:12:33 PLSSel(0,0x08)
20:18:09 MISSel(0,0x00,0x00)
20:18:09 PLSSel(0,0x01)
20:18:40 MISSel(0,0x00,0x00)
20:18:40 PLSSel(0,0x08)
20:18:49 MISSel(0,0x00,0x00)
20:18:49 PLSSel(0,0x08)
20:18:55 MISSel(0,0x00,0x00)
20:18:55 PLSSel(0,0x08)
20:18:56 MISSel(0,0x00,0x00)
20:18:56 PLSSel(0,0x08)
20:19:15 MISSel(0,0x00,0x00)
20:19:15 PLSSel(0,0x08)