Getting started with TRUNKER is tricky and can be frustrating ---
You need to describe which "flavor" or trunker you are trying - trunker 3.83 (DOS), UniTrunker, etc.
Also indicate what, if anything, you already have working. We can then pick up from there and try to help.
What radio did you tap?
Did you tap it yourself?
Have you verified the tap?
Do you purchase a slicer or build one?
Getting the tap and slicer to work are the biggest problems... but...
Once you start getting data, it takes a little time getting used to the interface for trunker itself.
...but it's worth in in my opinion...