change:
chmod($WA_DFP_UploadStatus["WA_UploadResult1"]["serverDirectory"]."".$WA_DFP_UploadStatus["WA_UploadResult1"]["serverFileName"], 0644);
to:
chmod($WA_DFP_UploadStatus["WA_UploadResult1"]["serverDirectory"]."".$WA_DFP_UploadStatus["WA_UploadResult1"]["serverFileName"], 0644);
chmod($WA_DFP_UploadStatus["WA_UploadResult1"]["WA_UploadResult1_2"]["serverDirectory"]."".$WA_DFP_UploadStatus["WA_UploadResult1"]["WA_UploadResult1_2"]["serverFileName"], 0644);