Why is my large_products_image NULL in phpmyadmin?

[Isiah]

Well i installed a contribution called CLUBOSC THUMB IMAGES and what this does is give me the ability to have two images per product one would be the thumbnail and the other would be popup image so a larger image and a smaller one. There was an sql command that i was suppose to run to add a table for large_products_image and i did that successfully and now i modified my csv with a new column v_large_products_image and i put the valid directory for each products picture but when i upload the csv it doesn't update the large_products_image field for any of my products it just says NULL. And i don't understand why could someone please help me out and tell me what i need to do. Thanks for any one who can help.