Values not populating in Notification mail

Hi,

We have the below requirement.

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1. In the earlier development we were showing only  Parked Document Number in the mail notification
2. Now we need to show Vendor# Account# etc.
3. I implemented below code

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4. I created a structure in SE11 which is below

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5. In PFTC I created a container element 'ZSF_APINV_TRANS'

    Assigned the structure created in SE11 which is 'ZSF_APINV_TRANS'.

6. Created binding for the structure for the step

7. After this I activated and run the interface – in the program we are getting values for ZSF_APINV_TRANS but the same values are not show in workflow(Notification mail)

Please suggest if any thing missing.

Regards,

Rafi