wbopendata 是可以下载世行数据的STATA命令， 但是我进行下载的时候出现以下的问题
前两个问题我都可以连接上，证明网络应该没问题。
重点是第3个的netio 这个怎么设置呢？
求高手解答！！

db wbopendata

. wbopendata, language(en - English) country(cCHN;) topics() indicator(GDPPCKD - GDP per Capita, constant US$, millions) long

    (1) Please check your internet connection by clicking here, if does not work please check with your internet provider or IT support,
    otherwise...
    (2) Please check your access to the World Bank API by clicking here, if does not work please check with your firewall settings or
    internet provider or IT support.
    (3) Please consider ajusting your Stata timeout parameters. For more details see netio.
    (4) Please send us an email to report this error by clicking here or writing to:
            email: data@worldbank.org
            subject: wbopendata query error at 23 Sep 2014 09:18:06: http://api.worldbank.org/en/coun ... /GDPPCKD?date=&

r(2);