hello Fatih,
ok lets begin with browser. i'm using IE8. when there is no certificate installed for specified resource there is "Certificate Error" appears. i've installed this certificate but when i'm trying to launch again this web console, there is same situation... after several minutes, there is given an error message:
----------------------------
Internal error
check log file for details and ste stack trace. you can increase the tracing level by setting TraceMgr.level=10 in conf/tracemgr.properties file.
----------------------------
and about OS language,
i have chosen English...