help with frequencie

[lilik256]

i have nearly all the channels working except the 3 channels working on frequencie 562.000. when i go to these channels it sais no or bad signal. i live in sw london and im on virgin is their anything i can do about this?

[Fergal]

Try editing the frequency to 562.750 and save.

[lilik256]

how do i do that?

[Fergal]

how do i do that?
menu,installation scroll to the freq then i think its green button to edit then you can alter the freq then ok to save