Problem with xSIID NFC + LED

I searched the forum a bit and found this thread
And now I have a few questions.

  1. How do I make sure that my problem is related to this thread? Is it likely that I could make my problem worse if I execute it?
  2. If it is related, how can I execute the command suggested in the topic with my iphone? Can I do it with NFC Tools (pro version) or TagWriter?