Request for help Lupo 1.4l does not start after starting aid

Hello Lupo specialists, I have here a 1.4l Lupo, the Fzg. data I once set as a photo of the sticker in the boot below. The problem – I gave with the Lupo start aid (as a donor), also successful. When the other Fzg ran, I removed the start aid cable (minus pole first) from the Lupo. During or immediately after that the engine of the Lupo went off. Let itself start again to go out again shortly afterwards. Since then he can no longer move to the run. What happened, can you give tips or help?