HD problems ok on 28.2 but not on 13 and 19

[madgooner]

Hi,, running Nabilosat Black Hole V0.12 with CCam 2.1.3 no problem for months suddenly 28.2 hd fine but when i go to 19.2 and 13 the reciever says Tune failed got a good signal on SD channels but nothing on HD, i have been away for a few weeks even tried retuning each channel.
The only thing i can think is put all the software back on but that is my last resort. Any ideas?
Thanks

[xanadu]

Check your diseqc 1.1 settings as this is a common problem.