Golf 6 Codes not accepted

Hello, I have the following problem: I drive a Golf 6 GTI and have borrowed from a friend his laptop with VCDS. I connected everything, then went into the coding assistants and wanted to encode some things with me (coming home / leaving home, etc.). I go to the straight bit and byte and make the hook, then go on close and then there is: “coding was accepted”. I thought cool everything was done right. I then finished VCDS, the Ignition turned off and the plug pulled off. When I turned everything on again after 5 min, the car did not take over neither you function and when I went back into the power supply control unit, the hooks there were no longer there, which I put before. I then tried it more often but always the codings were accepted and when I looked in again they were not activated. I hope someone can help me Thanks