On the attachments tab, you have bound to the post, you need to set the binding to use the WA Uploaded Files -> Server Directory and Server File Name variables.
In the attachments section, click the lightning bolt and select the WA Uploaded Files -> Server Directory binding. this will add code similar to:
<?php echo $WA_DFP_UploadStatus["WA_UploadResult1"]["serverDirectory"]; ?>
Copy that and then click the lightning bolt again and select the WA Uploaded Files -> Server File Name, now the code will be similar to:
<?php echo $WA_DFP_UploadStatus["WA_UploadResult1"]["serverFileName"]; ?>[/php]
paste the code from the previous selection in front of it so the code is:
<?php echo $WA_DFP_UploadStatus["WA_UploadResult1"]["serverDirectory"]; ?><?php echo $WA_DFP_UploadStatus["WA_UploadResult1"]["serverFileName"]; ?>