signals are strong but unable to scan any services

[amila4341]

hello friends

I have vu+ duo2
Satellite ST 2@ 88.0 , Videocon D2H

now its 4 tp my receiver not scanning channels all tps have 80 s% snr
TP (04) signals are strong but unable to scan any of the services

11483 H SR 44995 FEC 2/3 DVB-S2 8PSK
11546 V SR 44995 FEC 2/3 DVB-S2 8PSK
11546 H SR 44995 FEC 2/3 DVB-S2 8PSK
11672 H SR 44995 FEC 2/3 DVB-S2 8PSK


i have installed dvb snoop can it be used to find cause of this issue
and all other tps scanning perfectly.
and other tps also 44000 plus samble rate..
Tuner is AVL 6222.