Scriptable Cart Add Item to Cart Problem

I am trying to add an item to my cart programmatically using suite script. I wrote the following recalc code that gets executed (just a snippet).
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function recalcCart(type, name)
{
//PRE PROCESSING
            nlapiSelectNewLineItem('item');
            nlapiSetCurrentLineItemValue('item','item','1000',true,true);
            nlapiSetCurrentLineItemValue('item','quantity',5,true,true);
            nlapiSetCurrentLineItemValue('item','price', 1, true, true); //set to custom price                                                                      
            nlapiCommitLineItem('item');
//POST PROCESSING
}
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While the item gets added, I am apparently not setting all the correct fields. The quantity box shows the correct quantity, but it is disabled. The Remove [x] does not display. Then when I update the cart the item will just disappear.