However, all the necessary permission were added (such as 755 and file ownership) but still cannot work.
Actually, I meet this problem before (another server). I've asked my office support and he did something (of course, he did tell me what he did) to fix it. So anyone can help me? Thanks!
note: The apache was compile at system installation (rmp install) and so, most of the configutation parameters were default, except:
AddHandler cgi-script cgi pl
Options +ExecCGI -Includes -Indexes