esc does not restart

hi everyone,
I am working on an arduino-drone which uses four esc's. three of those four work perfectly fine but I have a problem with the forth one. the last one starts perfectly and speeds up beautifully but when I send a signal to stop the motor this is executed but the esc begins beeping and I cannot restart the motor after that. I treid switching the ports I use for the connection with the arduino but that does not work. my code is not the problem. but the esc is. does annyone of you guys know how t solve my problem?

Thanks in advance,
S.G.