Hi Sujatha,
How does TestComplete work with the Orders application? This should help us understand whether the issue is specific to your application or not.
3. How does TestComplete recognize a sample WPF application shipped along with the product?
<Users>\Public\Documents\TestComplete 9 Samples\Open Applications\WPF\bin\Release\Orders.exe (Windows 8,7, Vista and Windows Server 2008)
<Documents and Settings>\All Users\Documents\TestComplete 9 Samples\Open Applications\WPF\bin\Release\Orders.exe (Other operating systems)