前几天，北京环保局的同志反映在他们的那不能访问我们silverlight做的一个系统——空气质量实时发布系统，这就奇怪了，我们系统上线后，全国各地都能访问。三大网络都能正确访问，不过据我了解，系统和网络无关。他们怎么不能访问系统呢？我花了一些的时间，把服务器上的所有设置都查看了，确保我们服务器上的设置这确。检查结果没有什么可能影响到他们访问的，他们无妨访问，弹出的错误如下图：
没办法我们带着监测工具就到他们那里去，帮忙检查一下。结果发现，他们用的是歌华有线电视网络，并且他们访问网络的请求信息如下，在请求System.Windows.Controls.Data.zip 、System.Windows.Controls.Data.Input.zip等系统动态库的时候出现了错误，无法下载该Zip的动态库，即弹出2152错误，提示信息是：无法下载silverlight拓展框架System.Windows.Controls.Data.Input.zip等。所以在下面的请求消息中会发现，302 HTTP 58.68.130.147 /air/air/ClientBin/System.Windows.Controls.Data.zip响应信息，最后又出现504 HTTP 118.26.190.23:9205 /clientaccesspolicy.xml 512 text/html iexplore:5148 信息，是由于客户端从服务器上下载zip动态库缓存失败，会自动将请求者转到不同的位置，所以出现了504 HTTP 118.26.190.20:9203 /clientaccesspolicy.xml 512 text/html iexplore:5148信息，提示在该路径下找不到跨域文件，所以跳转到给路径访问失败，无法下载zip动态库缓存，所以应用程序初始化失败。
最后，还是网络传输上有些问题，歌华网络公司对他们的网络传输在做了一些修改，就可以访问了。
# Result Protocol Host URL Body Caching Content-Type Process Comments Custom
2 304 HTTP 58.68.130.147 /air/air/airtestpage.html 0 iexplore:5148
3 304 HTTP 58.68.130.147 /air/air/Silverlight.js 0 iexplore:5148
4 304 HTTP 58.68.130.147 /air/air/ClientBin/Air.xap 0 iexplore:5148
5 200 HTTP 58.68.130.147 /air/air/ClientBin/System.Windows.Controls.Data.zip 145,396 application/x-zip-compressed iexplore:5148
6 304 HTTP 58.68.130.147 /air/air/ClientBin/System.Windows.Controls.Data.Input.zip 0 iexplore:5148
7 200 HTTP 58.68.130.147 /air/air/ClientBin/System.Windows.Controls.zip 113,705 application/x-zip-compressed iexplore:5148
8 304 HTTP 58.68.130.147 /air/air/ClientBin/System.Windows.Controls.Input.zip 0 iexplore:5148
9 304 HTTP 58.68.130.147 /air/air/ClientBin/System.Windows.Controls.Navigation.zip 0 iexplore:5148
10 200 HTTP 58.68.130.147 /air/air/ClientBin/System.Xml.Linq.zip 52,765 application/x-zip-compressed iexplore:5148
11 304 HTTP 58.68.130.147 /air/air/ClientBin/System.Windows.Data.zip 0 iexplore:5148
12 304 HTTP 58.68.130.147 /air/air/ClientBin/System.ComponentModel.DataAnnotations.zip 0 iexplore:5148
13 304 HTTP 58.68.130.147 /air/air/ClientBin/System.Json.zip 0 iexplore:5148
14 200 HTTP 58.68.130.147 /air/air/ClientBin/images/Welcome/button02.png 3,560 image/png iexplore:5148
15 200 HTTP 58.68.130.147 /air/air/ClientBin/images/Welcome/lastlayer%20768%201010.png 701,650 image/png iexplore:5148
16 200 HTTP 58.68.130.147 /air/air/ClientBin/images/Welcome/logo.png 43,450 image/png iexplore:5148
17 200 HTTP 58.68.130.147 /air/air/ClientBin/images/Welcome/lou.png 425,928 image/png iexplore:5148
18 200 HTTP 58.68.130.147 /air/air/ClientBin/images/Welcome/button01.png 3,596 image/png iexplore:5148
19 200 HTTP 58.68.130.147 /air/air/ClientBin/images/Welcome/lou02.png 245,571 image/png iexplore:5148
20 200 HTTP 58.68.130.147 /air/air/ClientBin/images/Welcome/button001.png 3,632 image/png iexplore:5148
21 200 HTTP 58.68.130.147 /air/air/ClientBin/images/Welcome/lou03.png 197,310 image/png iexplore:5148
22 200 HTTP RSS.msn.com.cn /RSS/tips.xml 266 max-age=300 Expires: Tue,07 Dec 2010 05:59:09 GMT text/xml msnmsgr:2556
129 302 HTTP 58.68.130.147 /air/air/ClientBin/System.Windows.Controls.Data.zip 0 iexplore:5148 130 304 HTTP 58.68.130.147 /air/air/ClientBin/System.Windows.Controls.Data.Input.zip 0 iexplore:5148 131 304 HTTP 58.68.130.147 /air/air/ClientBin/System.Windows.Controls.Input.zip 0 iexplore:5148 132 302 HTTP 58.68.130.147 /air/air/ClientBin/System.Windows.Controls.zip 0 iexplore:5148 133 304 HTTP 58.68.130.147 /air/air/ClientBin/System.Windows.Controls.Navigation.zip 0 iexplore:5148 134 304 HTTP 58.68.130.147 /air/air/ClientBin/System.Xml.Linq.zip 0 iexplore:5148 135 304 HTTP 58.68.130.147 /air/air/ClientBin/System.Windows.Data.zip 0 iexplore:5148 136 304 HTTP 58.68.130.147 /air/air/ClientBin/System.Json.zip 0 iexplore:5148 137 304 HTTP 58.68.130.147 /air/air/ClientBin/System.ComponentModel.DataAnnotations.zip 0 iexplore:5148 138 200 HTTP 118.26.190.23:9205 /9382443A108E638BA85E676854E46106D85544B6BDEFB06BF3679CBBD2A54B7512FCB7801A80EEA10B8C28320/58.68.130.147/air/air/ClientBin/System.Windows.Controls.Data.zip 145,396 application/x-zip-compressed iexplore:5148 139 200 HTTP 118.26.190.20:9203 /9382443A4042886D1CCE4BA8C99CAC2BCEAEC5BEA153F02559E2EEC1959D826A5605DA307DE22FCA296379810/58.68.130.147/air/air/ClientBin/System.Windows.Controls.zip 113,705 application/x-zip-compressed iexplore:5148 140 504 HTTP 118.26.190.23:9205 /clientaccesspolicy.xml 512 text/html iexplore:5148 141 504 HTTP 118.26.190.23:9205 /crossdomain.xml 512 text/html iexplore:5148 142 504 HTTP 118.26.190.20:9203 /clientaccesspolicy.xml 512 text/html iexplore:5148
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