how to track down primary key violation problem

We have a specific file from our application that cause PK violation on our SQL 2008 server. I would like to track down what those fields are and I know which DB and table those field resides.  The application itself only show the error with PK violation and it didn't show what those fields are. I tried using SQL profiler but was unable to location the transaction and the relevant errors. Can anyone suggest what troubleshooting technique I can use for this particular problem?

Thanks