This phase I trial studies the side effects and best dose of recombinant interleukin-15 in
treating patients with melanoma, kidney cancer, non-small cell lung cancer, or head and neck
cancer that has spread to other places in the body and usually cannot be cured or controlled
with treatment. Recombinant interleukin-(IL)15 is a biological product, a protein, made
naturally in the body and when made in the laboratory may help stimulate the immune system in
different ways and stop tumor cells from growing.