Chage Tracking - Query returns Null values

Hi,

To enable chage tracking:

1. It has to be enabled in the MDM console for the repository

2. On the SQL server -<rep_z000>A2i_CM_history excute the query

however, though changes are made in the repository, they do not get tracked here, the query is excuted succesfully but generates no output.

In this case are there any other parameter to be checked.

Our MDM version 5.5.36.40

SQL Server version MS SQL Server 2005 SP1, OS : - Windows NT 5.2 i.e. win2003

Thanks in advance for your suggestions & help ,

Regards,

Anita