All 2K3 products W2K3, E2K3, SQL2K3 require v9.0.4454. You may be getting user data backed up off the W2K3 box, but I'd be willing to bet that the system state is not backing up, and you will not get any E2K3 data stores (there is no information store in E2K and E2K3, they both use AD instead)