This article contains some general hints and tips regarding configuring Axe for use with HP Quality Center.
Custom Field for Axe Id
When configuring which QC Test Plan field to use for the Axe Id you must use a QC user defined field e.g. QC_USER_01.
Do not use TS_NAME or any of the other built-in QC fields for this otherwise unpredictable behaviour may occur.
For further details see 'Configuring Axe Manager' in the Axe Integration Guide for HP.