Microsoft OLE DB Provider for ODBC Drivers error '80040e14'

[Microsoft][ODBC Microsoft Access Driver] Syntax error (missing operator) in query expression '(productcategory.catId = AND productcategory.prodItemId = products.itemId) AND products.viewable = 'Yes' AND (products.curInventory > 0 OR products.curBackOrder > 0)'.

/merchandise/kgeMerch.asp, line 19