如题，下载失败后的界面是这样的

package name:  ivreg2.pkg
        from:  http://fmwww.bc.edu/RePEc/bocode/i/

checking ivreg2 consistency and verifying not already installed...
connection timed out -- see help r(2) for troubleshooting
could not copy http://fmwww.bc.edu/RePEc/bocode/i/ivreg29.ado
(no action taken)

r(2);

怎么办～谢谢大家