[Erlangweb-users] bin/start_interactive yaws problem

[kingrl <try...@gm...>]

Hi,
"bin/start_interactive yaws" can not start up the yaws server .  I find the problem is :
=SUPERVISOR REPORT==== 28-Aug-2011::02:22:01 ===
     Supervisor: {local,yaws_sup_restarts}
     Context:    start_error
     Reason:     {'EXIT',{error,could_not_load_driver}}
     Offender:   [{pid,undefined},
                  {name,yaws_sendfile},
                  {mfargs,{yaws_sendfile_compat,start_link,[]}},
                  {restart_type,permanent},
                  {shutdown,5000},
                  {child_type,worker}]
How could I solve it? 
Thank you!