 If you continue on to the second part of this study, you will be randomly assigned as in the toss of a coin to receive either: a daily ZD6474 alone, or b paclitaxel and carboplatin every 3 weeks along with daily ZD6474. You have an equal chance of being assigned to either group. If you receive paclitaxel, you will receive it as a 3-hour infusion into a vein on the first day of each treatment cycle. If you receive carboplatin, you will receive it by vein immediately following the paclitaxel infusion. The carboplatin infusion will take between 15 and 30 minutes. Treatment with either daily ZD6474 or ZD6474 plus paclitaxel and carboplatin will continue until your diseases worsens or until severe side effects occur. 