hdt,
Are you saying your NEW battery is dead?
Most new batteries come from the store with at/ nearly a full charge. If the new battery is dead, did you start the vehicle immediately after you installed the new battery to verify that it was working and the old battery was the problem?
If the new battery was dead, I would take it back since it should have been charged enough to start your vehicle...it may have a defect since some brands do not have very good quality control and what you pay is not necessarily an indicator of quality.
...Rich