Clickbank problem, please replay

Hello guys,
So i have clickbank and i had sale or 2 every day. It was very good for me, but last 6 days i didnt have any sale. It was strange becuase I am still getting traffic on my website (even better then before). I was watching for links and i saw there is no more hop=my id on clickbank, but there is tll_i4/?t= (something like that). I am not expert on clickbank, so can someone please help me? What does this mean, is there any problem with link or not? Thank you.

Did you test your links? maybe the links are broken or something.
Make sure they are working fine.