Importing inventory problem


I am using the latest version of CScart ( not 2.0 ), my problem is with the importing of inventory quantities? When I upload products from a CSV file with a quantity the amount shows in product set up and on the item detail but when I try to place it in a cart I get “no stock in inventory” even though it is showing stock. When I go into that specific item under manage products and reenter the stock amount and then click “save changes” it works fine.

What am I doing wrong when I import. I need to be able to import inventory levels for several thousand items at a time so going into to each one to click save is just not going to work. Any help or advice would be appreciated.