Benchmark test case "qnetworkreply" (../tests/benchmarks/network/access/qnetworkreply/) running can't finish by itself

Step:
1. Install S60 SDK 5.0
2. Download Qt4.7.1 lib form "qt.nokia.com", the link is:
http://qt.nokia.com/downloads/downloads#lgpl
And install "qt-symbian-opensource-4.7.1-s60.exe" to directory "../Qt4.7.1"
3. Download Plug-In from Forum Nokia, the link is:
http://www.forum.nokia.com/info/sw.nokia.com/id/91d89929-fb8c-4d66-bea0-227e42df9053/Open_C_SDK_Plug-In.html
And install "s60_open_c_cpp_plug_in_v1_7_en.zip"
4.Download benchmarks tests from git URL: git://gitorious.org/qt/qt.git
Check branch to "origin/4.7" and copy "tests" folder to "../Qt4.7.1/" of step2 installed
5.Compiling "qnetworkreply" (../tests/benchmarks/network/access/qnetworkreply/)
Use command:
>qmake
>make release-armv5
6.Installed Qt4.7.1 libs and benchmark application "qnetworkreply" on 5800, N8, N97mini, X6, E72 and E71.
7.Launch the application by parameter "-xml -o"

Expectation results:
1.Running finished after launch 10 minutes and the output xml file can be generated.

Actual results:
1.Running can't finish after waiting for 30 minutes,manual interrupted the testing, the output xml file is 0KB.