The switch has two images, these are the locations where the firmware is installed. One image is active at a time, with the other image being a backup image. The stk file is what is copied to these images. When you performed these steps did you run across any error messages? did the file transfer complete successfully?
Hello, I did the procedure again and the second attempt worked and I was able to access the switch., .. thank you very much for your help .. greetings