<qa>  What is the purpose of SU011248?Specific Aims: 1 To evaluate the efficacy and safety of SU011248 in men with chemo-naïve AIPC, 2 to evaluate the efficacy and safety of SU011248 in men with metastatic, taxane-resistant AIPC, 3 to measure serum biomarkers in men with AIPC prior to and following treatment with SU011248 and correlate these markers with clinical response, and 4 to mutational analysis from tumor specimens of men with metastatic prostate cancer treated with SU011248 and correlate with clinical response. 