thanks for all the links,and this one catch my eyes:

1. In Report Server Url, enter the Url for the report server. For example, type http://myservername/reportserver.

2. In Report Path, enter the path of the report on the server.

   If the report server runs in native mode, the path name begins with the root / and includes the folders and report name. For example, type /AdventureWorks 2008 Sample Reports/Company Sales 2008.

   If the report server runs in SharePoint integrated mode, the path name is a fully qualified URL. For example, typehttp://myserver/sites/mysite/mylibrary/AdventureWorks 2008 Sample Reports/Company Sales 2008.rdl.

it's still no working after i replace it with my domain name, i use  "http://exampledomain.com/reportserver" as report server url and "http://www.exampledomain.com/Report.rdlc" as report path.

already upload the Report.rdlc. 

Note: i dun have "reportserver" 's folder ay mt server, is this correct?