Hello,
The two versions of LabVIEW Real-Time are not compatible with each other, so you will have to either get the 7.1 development system, or use a PXI controller for your RT target. The reason for this is that LabVIEW 7.0 did not support desktop PCs as real-time targets, so if a PXI controller is not an option, you will have to upgrade.
Regards,
Vineet A.