Brake light switch P0571 Seat Arosa

Hello, At the moment I have the problem with my girlfriend’s car that the EPC lamp is on. According to VAG Tester it should be the brake light switch (brake light switch implausible signal static). The brake lights functioned normally, but I changed the switch then, unfortunately unsuccessful. Hardly from the yard already the EPC lamp is on again. Have now also checked the fuses and checked for passage, everything ok. What makes me now only stubborn, that if I the fuse z It’s supposed to be SB15 according to the safety plan. Only then I don’t understand why the brake lights go without a fuse. Maybe someone can help me further. Data about the car Seat Arosa Bj. 2001 MKB AUD 1.4l I installed the new switch in the resting position of the pedal.