Phase II trial to study the effectiveness of combining bortezomib with gemcitabine and carboplatin in treating patients who have advanced or recurrent non-small cell lung cancer that has not been previously treated with chemotherapy. Drugs used in chemotherapy, such as gemcitabine and carboplatin, work in different ways to stop tumor cells from dividing so they stop growing or die. Bortezomib may stop the growth of tumor cells by blocking the enzymes necessary for their growth. Bortezomib may also help gemcitabine and carboplatin kill more tumor cells by making the cells more sensitive to the drugs