If you have a motor, firstly go to antenna setup, then come down to positioner, USALS, highlight USALS and enter the menu, select the Sioux transponder on the drop down list, Then go to movement, nudge east or west to see if anything can be gained by nudging.
As I nudged tonight and the signal was right where it should be.
If you do get better signal....
You will then have to change positioner to DiSEqC1.2, as above this time enter the DiSeQC1.2 menu, nudge the dish for peak quality... then assign a position number and store.