Unable to map fields when trying to import the *.xls file in Zephyr Squad

Trying to import the test cases through Zephyr Squad. 

Setup:

1. 1. Import the *.xls file.
2. 2. Click on Next

Settings:

1. 1. Row number to begin import * - selected the appropriate value
2. 2. Discriminator - selected the appropriate value
3. 3. Selected import all sheet radio button
4. 4. Click on Next

Mapping:

1. Description - I was expecting the row header name as mentioned in the *.xls values but I see the below options which is not atall the part of the *.xls file.
2. 

    

Please let me know if anyone has faced this issue or by any chance their is a way to resolve this.