03 745i starting problem.. Plse help!!

I bought an 03 745i a couple of months back n it was starting find until I let it sat for about 2 weeks without starting it. After it sitting I went to start it and the battery was dead so I charged it up and tried starting again but it wouldn't start. When pressing the ignition button I can hear the starter going but the engine isn't turning, the engine isn't lock because I can't turn it by hand. Any clues or ideas that can help I would really appreciate it.. Thanks

03 745i starting problem.. Plse help!!