Uploading file to workdrive from creator

Hello I am trying to upload a file from creator into my zoho workdrive but it does not seem to be working. A file does get uploaded but there is nothing when I try to look at it and just gives an error message saying "We couldn't generate a preview due to a mismatch in the file extension and the actual file format.". How would I fix this?

row.Temperature_Log is a file upload field

Deluge code in creator:

tempFile = row.Temperature_Log;

fileName = row.Temperature_Log.acualname;

activeLogFolder = "0ca1f1e84ba0689a14289829fbf6600e6ee18";

if(tempFile != null)

{

myResp = zoho.workdrive.uploadFile(row.Temperature_Log,activeLogFolder,fileName + " " + input.Customer,false,"writerconnection");

attributes = myResp.getJSON("data").getJSON("attributes");

strLocation = attributes.getJSON("Permalink");

fileID = attributes.getJSON("File INFO").getJSON("RESOURCE_ID");

row.Log_Added=zoho.currenttime;