Bugger - just checked http://resources.businessobjects.com/support/communitycs/TechnicalPapers/boe_xi_r2_supported_platforms_windows_sp2.pdfand Oracle 11G is NOT listed as a supported CMS database. So first update your BO system. If you go to the SAP Marketplace, download
| ENTERPRISEA06P_0-20008636.EXE | BusinessObjects Enterprise XI R2A Service Pack 6 Patch |
to get SP6 for XIr2 and install that first. Do the copy of the database later.
Also note that BOXIr2 is no longer under support with SAP. So make some plans to migrate to BI4.1 sometime soon. Real soon.