lexdallas

Hello everyone I really need help on this please...
I reset (via techstream) my car immobilizer due to all key lost situation... All reset process was perfect but at the moment to register a new smart key code, I had a car battery issue and was not able to add that key. I disconnected the battery to recharge and then I put it back later to continue the process, but this time the dash is not coming on, when I push the start button nothing happens, only the door light is on on the dash but nothing else. I attempted to reset the immobilizer again but keeps failing. The security light keeps flashing all the time... I disconnected all horns. No idea what else to do in this case... I have been searching online but nothing to solve this issue. Thanks for your help!