Select Statement Combining Rows

I need some help with a query . I have two tables "config" and "item".

I have table config as follows:
ConfigID
ItemID

With Values
ConfigID ItemID
14583 2776
14583 2798
14583 3112

And table item as follows:
ItemID
ItemTypeID
ItemValue

With Values
ItemID ItermTypeID ItemValue
2776 1 123
2798 2 ABC
3112 3 789

So the query:
SELECT ConfigID,
(SELECT ItemValue WHERE ItemTypeID = '1') AS Model,
(SELECT ItemValue WHERE ItemTypeID = '3') AS Minor,
(SELECT ItemValue WHERE ItemTypeID = '2') AS Customer
FROM config c, item i
WHERE ConfigID = '14583'
AND c.ItemID = i.ItemID

Produces the result:
ConfigID Model Minor Customer
14583 123 NULL NULL
14583 NULL NULL ABC
14583 NULL 789 NULL

How do I change the above query to get one row:
ConfigID Model Minor Customer
14583 123 789 ABC

Thanks for your help