spiderbox 9900

i'm having prob with the tv2 on thor for english football, sat keeps on continally coming up scrambled channel message goes off comes back on again for about 5 mins and does the same again over and over again even after rebooting anyone any ideas as i am a newbie could just do with some guidance, the system i have is spiderbox 9900 with 1mtr motorised dish:respect-064::respect-064::respect-064:

tv2 pl1 HD seems ok to me my sig is 79% and quality is 86%

assuming you are talking about this particular channel, press info twice and write down and report back your signal and quality levels

hi signal 97% quality 81%