Hi Pr,
Below points are mandatory.
1. DSO to Cube, Full load, you need to select data from ACtive table(without archive). Even if you keep as Delta mode also no problem. First load its pick all data which was avaiable at active table.
2. DSO to Cube: for Delta load you need to choose data from Changelog table and mode as delta.
You can check below doc.may be helpful.
http://scn.sap.com/docs/DOC-31781
Thanks