StarTech.com StarView SV211K 2-port KVM Switch "sky signal lost" Questions

...of certain channels ie setanta sky sports 2 among others line flashes red for poor quality of signal any help please try this link for you problem . hope it is of some help.

sky one. the tv listings were all there but signal unknown. reset factory settings now have no channels at all. i'm on virgin in bristol. what codes or frequency do i need? restore to factory defaults