I'm having a serious problem with me truck (1997 F150 Lariat). I parked it for a week and then tried to start it. Everything went dead. I checked the battery and found that it was totally discharged. i got it recharged and tried it this morning. The lights stay on but when I turn the ignition to ON, the cluster lights keep going on and off and there is a ticking sound that is coming from the fuse/ relay box in the engine. When I try to start it it just shuts down totally.

Could it be improper contact from the battery connectors or something more serious?