do you have the Windows sounds active ?
(do you hear this "Ding-Dong" when dis-/connecting the programmer?)
A weak point are the USB connectors at the programmers.
Typical indications are several "Ding-Dongs" when moving the attached
cable at the programmer side slightly up and down.
This can be the reason for a "works sometimes" problem.
I assume you tried already another cable?
Gunter
(do you hear this "Ding-Dong" when dis-/connecting the programmer?)
A weak point are the USB connectors at the programmers.
Typical indications are several "Ding-Dongs" when moving the attached
cable at the programmer side slightly up and down.
This can be the reason for a "works sometimes" problem.
I assume you tried already another cable?
Gunter