I am using the Upload Utility to try to upload data.  I have successfully uploaded several CSV files using the import type of "Delete Existing and Add" and "Add at the end",  But when I try to upload a CSV file using the "Add, replace if already exists" import type, it seems like the upload is getting hung up.  The status on the bottom of the GUI interface says "Logged in Successfully, Uploading data",  but it has been stuck on that for several hours.  I have entered the name of a single column in the Columns to match field.

 

Can you help?  Thanks