OK lets start from scratch and i don assume you are an expert so we do this really basic
I have attached my satellites.xm file working for me with Viasat 4.8east KU Band
Download and unzipp then upload with ftp to folder /etc/tuxbox and overwrite yours.
Now Restart your STB and go to tuner config and check that your tuner is setup right.
When done do a test with signalfinder to see you have signals. Be sure to chose predefine satelite!! not frequence!!
If all is okey then do an full automatic scan whit NETWORK SCAN set to yes!!
And i am pretty sure your channels will start to populate your STB