If your using DiSEqC 1.2 you will have to set-up the dish positions manually.
If your usuing USALS it should be automatic.

Here’s the USALS procedure from memory (someone please jump in and correct me if I’ve made any mistakes)

First make sure the dish is correctly aligned on a satellite, eg Astra 19.2

Press Menu -> Set Up -> Service Searching -> Tuner Configuration
Choose Tuner
ALPS BSBE2 (DVB-S2) - Press OK
Configuration Mode: Advanced
Satellite : Choose the satellite you want, eg Astra 19.2e
Voltage Mode: Polarization
Tone Mode: band
LNB : LNB 1
DiSEqC Mode: 1.2
Use USALS for this Sat: Yes
Longitude: Set this to the correct Longitude for your area.

To find the correct longitude settings for your area go to the following website
http://www.multimap.com/
In the “Find a Map” box at the top left of the page, enter your post code.

Select your country in the drop down box below it and click on the “Find” button.
This will display a map on the screen and below the map at the bottom right you
will see your Latitude information, example below for Post Code NW1 UK :-
Lat: 51:31:59N (51.53319)
Lon: 0:08:40W (-0.1445)
So in this example in the Dreambox menu you’d set
Longitude: 51.533
West