Stock by Attribute v4.0 addon for v1.3.5-1.3.9

[kuroi]

@2PT

Try cutting, pasting and executing just this bit into your Admin > Tools > Install SQL Patches page. I don't expect it to be a complete solution, but it may help your forward a step and give clues as to what the issue is.

INSERT INTO configuration (configuration_title, configuration_key, configuration_value,
configuration_description, configuration_group_id, sort_order,
last_modified, date_added, use_function, set_function)
VALUES ('Show available stock level in cart when less than order', 'STOCK_SHOW_LOW_IN_CART', 'false',
'When customer places more items in cart than are available, show the available amount on the shopping cart page:',
'9',
'6',
NULL,
now(),
NULL,
"zen_cfg_select_option(array('true', 'false'),"
);