Have you set the Deployment Server Edition property appropriately on your 
project?
http://cwebbbi.spaces.live.com/blog/cns!7B84B0F2C239489A!856.entry
HTH,
Chris
-- 
Chris Webb, MVP
Analysis Services and MDX Consultancy: http://www.crossjoin.co.uk
Blog: http://cwebbbi.spaces.live.com/
Thanks for your help!
Mahesh