@frazgta
What is the quality of the analog cable? signal strength has to be above 50% to get digital channels on the box.
Try this as well, did gives more channels:
On your COSHIP box press:
Menu-->Installation-->List Search.
In the List Search dialog box, put the following settings:
Start Frequency: 100.0
End Frequency: 999.0
QAM: QAM64
Press "Start Search".