Thank you, Jim!
There is a field called LOF 2, and the value was 10600. Here is a new list after I changed it to 10750:
1=11929,V,49089
2=12056,V,14999
3=11720,H,20000
4=11780,H,20760
5=11840,H,20000
6=11899,H,20000
7=11929,H,20000
8=11990,H,20000
9=12050,H,20000
10=12080,H,20160
11=12140,H,20000
So I guess blind scan is working, but still Windows Media Center shows no signal. There is a choice for LNB: universal, single oscillator or dual oscillator. I picked single and entered 10750, still nothing.