Hello Hbdekor,
You can only include images in a .csv upload if they are externally hosted. You can use the URLs of where they are hosted in your images column, and if you are including multiple URLs, you need to separate them with the pipe character: "|". The images would need to have their captions in the location where you store them.
Otherwise, you would need to upload your images to your Auctiva account manually and add the captions within, then add the images to your listings.
If you encounter any difficulty with uploading a .csv file, please feel free to file a support case from under the Help tab of your account, letting us know what occurs for you so we can take a look.
- Craig