Hi Sandeep,
We regret for the time delay.
The issue, Edit Item Template not working in child table has been fixed and available in our latest version v5.1.0.51 which can be downloaded from the below link
http://www.syncfusion.com/downloads/latestversion/default.aspxLatest version includes many features such as Vista Support, Skin support,Data Catching Modes and improved Clientside Object Model.
For Unlock Key:
If you hold a Syncfusion license with a valid subscription, you can obtain your key for this version by visiting the "Download the latest versions" section within Direct-Trac and clicking on the appropriate key icon. If you're currently evaluating our products or considering renewing an expired subscription, please contact our sales team (salessupport@syncfusion.com) for the key and further details.
Thanks for your patience.
Regards,
Sureshsekaran.