Engine Mechanical problem
2001 MG ZR 4 cyl Front Wheel Drive Manual 80000 miles

i left my mgzr 160vvc kseries parked for two months obviously the battery was flat i tried my booster box which i found only had enough charge to disarm the immobilizer and not the car. any how i tried jumpstarting my car with a van but when i connected the leads to the van my horn started sounding i took them streight of and tried again but this time when i went to turn ignition on the car being jumped i can turn key to start position and nothing happens not even a click from the starter motor. cud a knacked battery cause this or should it still atleast turn over with jumpleads on. any help would be much grateful.