Leaking Hoover Steam Vac Model No. F5906-900?

I just bought my steam cleaner 6/29/07 at Wal-mart. I tried it out today and the clean water tank leaked everywhere from the bottom of the machine. I didn't even have it turned on yet or pushing the trigger handle. I had to keep flling it again and again with just (warm) not hot water and hoover cleaning solution just to get a small area of carpet clean. Why is it leaking? Is it suppose to? Is it broke? should I just take it back to Wal-mart? Please help!