Zero Turn Mowers

HUWRZ5424 early life electrical issue... serial number 072611C00. Purchased on 10/4/12 from Western Small Engines in Pell City, Alabama. The mower has been used only twice to cut grass, and after sitting a couple of weeks, the battery was drained. I attempted to jump start, but it was obvious that something is wrong because the starter seems to be engaged, even before turning the key switch. I searched the Answer Army forum and did not see posts matching this symptom. Please let me know the best way to get this issue fixed.