We need to upgrade our current MSTR version to MSTR 9, but our DW is not supported. Do we any alternative other than upgrading our DW?

Details of deployment are as follows

MicroStrategy Version: Version 8.0.3 (Build 8.0.589.393)

Intelligence Server (metadata)
Database: Microsoft SQL Server 2000 (8.00.2039) - SP4 (Standard Edition)
Operating System: Microsoft(R) Windows(R) Server 2003, Standard Edition Version 5.2 (Build 3790.srv03_sp2_gdr.090805-1438 : Service Pack 2)

Web Server Operating System: Microsoft(R) Windows(R) Server 2003, Standard Edition Version 5.2 (Build 3790.srv03_sp2_gdr.090805-1438 : Service Pack 2)

Data Warehouse (data) OS/Database: (AS/400 aka iSeries aka System i aka IBM i) DB2 UDB for iSeries, V5R3M5