Test Automation for custom objects in siebelThanb

Hi Team,

For a custom button, which was created on the same line of the "site Map" button and also attribute (like UN, RN) has also incorporated by JS code , which is required for test automation has been implemented.

But while playing the recorded "test script" for click on the "custom button" , it is not worked , everytime it is showing that "

No such element exception".

Kindly suggest how to pick the custom button and we can work through custom button in test automation.

Thanks

Avishek Jana