Hi Rodrigo Martins.
These points you need to check:
1. Check your older ULINK2, whether it can support the kinetis chip or not?
2. Did you connect the right JTAG or SWD wire sequence between the K60 and ULINK2? You can find a K60DN512 keil project, then use the ULINK2 to debug it, whether the code can work in debug mode? If yes, please make sure it is downloaded to the flash instead of the RAM.
Please check it at first.
Have a great day,
Kerry
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