Patients younger then 65 will be treated with irinotecan 100 mg/m2 on day 1 and 8 and capecitabine 1,000mg/m2 twice daily from day 1 to 14 every 3 weeks.For patiens equal to or older then 65, doses of irinotecan and capecitabine will be reduced to 60 mg/m2 and 750 mg/2, respectively.