为什么安装的支持rtsp协议的插件还不能运行呢？讨论~~~

在我们校园网观看流媒体电影的时候总提示"rtsp协议不是注册协议“。有朋友说需要安装一个插件，去下了那个插件，可问题依然没解决，那插件的官方站点的安装说明是这样的：
Building MPlayer to support RTSP/RTP streaming

Please do the following steps, in order:
Download and build the "LIVE.COM Streaming Media" libraries. You may wish to move the resulting "live/" directory to "/usr/local/", "/usr/local/lib/", or "/usr/lib/".
Download the newest version of the MPlayer source code.
If you wish to play media other than just MPEG-1 or 2, you should also download and install additional, third-***** codecs, before running "./configure":
The "FFmpeg libavcodec" package (for MPEG-4, H.263+, and motion-JPEG video)
The "FAAD library" (for MPEG-4 (AAC) audio)
The QuickTime libraries (for QCELP audio, and proprietary codecs commonly used by Apple QuickTime streams)
Note: Depending on where you live, some of these codecs might not be legal to use. You are responsible for determining the legality of these (third-*****) files before using them.
If, in Step 1, you moved the "live/" directory to "/usr/local/", "/usr/local/lib/", or "/usr/lib/", run
cd MPlayer* ; ./configure --enable-live

Otherwise, run
cd MPlayer* ; ./configure --enable-live --with-livelibdir=<path-to-LIVE.COM-Streaming-Media-library-directory>


Now, build and install MPlayer as usual - i.e.,
make ; make install

(Note that you must build MPlayer with the same version of "gcc" that you used to build the LIVE.COM code.)
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我按照他的说明下载了插件，解压缩后放在的/usr/lib目录里边。
然后下载了MPlayer-1。0pre2
解压缩后，进入mplayer-1。0pre目录，执行./configure --enable-live --with-livelibdir=/usr/lib/live命令
然后 运行 make ; make install
显示安装成功，但我依然不能在我们网站用mozilla自动调用realplay(已安装过mplayer-plugin.so)打开电影(奇怪的是其他的站上的电影mozilla可以自动调用realpaly打开！但是我们学校的只能用konqueror浏览器自动调用realplay打开,并可以正常观看！)
我想知道具体的原因，是哪个细节还存在问题呢？请各位兄弟指教，也欢迎大家来讨论这个问题！