RATIONALE: Drugs used in chemotherapy, such as irinotecan, work in different ways to stop the growth of tumor cells, either by killing the cells or by stopping them from dividing. Cyclosporine may help irinotecan work better by making tumor cells more sensitive to the drug. Monoclonal antibodies, such as panitumumab, can block tumor growth in different ways. Some block the ability of tumor cells to grow and spread. Others find tumor cells and help kill them or carry tumor-killing substances to them. Panitumumab may also stop the growth of tumor cells by blocking some of the enzymes needed for cell growth. It is not yet known whether irinotecan is more effective when given with or without panitumumab or cyclosporine in treating colorectal cancer.