Hello, Would you tell me how to install g++? Probably, I don't know the command. I got the file: g++-4.1_4.1.1-21_amd64.deb My machine is: vendor_id : AuthenticAMD cpu family : 15 model : 31 model name : AMD Athlon(tm) 64 Processor 3000+ With my best regards! Shijun Zhong Department of Pharmaceutical Sciences School of Pharmacy University of Maryland at Baltimore 20 Penn St. Baltimore, MD 21201 Tel: 410-706-7441