Kommandozeilenparameter richtig setzen ?

hallo,
hab hier dieses tool download.exe in nutzung, und es funzt auch.
ganz oben, file downloader http://noeld.com/programs.asp?cat=misc
nur hab ich probleme den parameter /display mit seinem <level> zu 
setzen.
ich raff das nicht.. kommt immer nur:
Invalid parameter value(s):
        /display (expected: none,normal,progress)
probiert habe ich:
/display:none
/display none
/display [none]
/display (none)
/display none text


die beschreibung sieht folgendes vor:
Usage:

  download [<source>] [<login> <password>] [/batch] [/cookies]
        [/credentials <auth>] [/delete] [/display [<level> [<mode>]]] 
[/move]
        [/newest] [/nocerterror] [/noredirect] [/notime] [/output 
<path>]
        [/overwrite] [/passive] [/post] [/proxy [<address> [<port>]]]
        [/referer <url>] [/register] [/resume] [/stop] [/subdir]
        [/timeout <delay>] [/unescape] [/update <condition>]
        [/useragent:<agent>] [/?]

Where:

  <source>     Fully qualified URL to the resource to download.
               - or -
               Fully or partially qualified path to a text file that 
holds a
               list of commands to process, if /batch parameter is 
specified.
  <login>      [optional] Clear-text credentials used to log on to the 
server.
  <password>

Optional parameters:

  /batch       Processes all the commands listed in the specified source 
file.
  /cookies     Enables cookies support, may be required for 
authentication.
  /credentials Encrypted login and password (bypass clear-text 
credentials).
                Credentials apply to proxy if specified after /proxy 
parameter.
                <auth> is either the path to the encrypted credential 
file
                (see logenc.exe module)
               - or -
                "login,password" in clear-text.
  /delete      Deletes local file if a download fails.
  /display     Sets the level of information that will be displayed and
                optionally the translation mode.
                <level> is either of the following values:
                 none     - no display at all.
                 progress - displays progression only.
                 normal   - standard display (default).
                <mode> is either of the following translation modes:
                 text     - default output.
                 unicode  - UTF-16 output.
                 utf8     - UTF-8 output.
  /move        Downloads the file then deletes it on the server (FTP).
  /newest      Only downloads newest file matching the wildcard (FTP).
  /noredirect  Only displays Location, the redirection is not executed.
  /nocerterror Ignores invalid certificate errors (HTTPS).
  /notime      Ignore file time on server (overrides /update and 
/newest).
  /output      Specifies a destination path and/or filename.
  /overwrite   Overwrites the output file if it already exists.
  /passive     Uses passive FTP semantics.
  /post        Uses POST (instead of GET) as HTTP verb.
  /proxy       Connects through a proxy.
                <address> is either the host name or the IP address of 
the
                 proxy (Internet Explorer settings are used if not 
specified).
  /referer     Specifies a referer URL.
  /register    Opens the registration site in the default browser.
  /resume      Attempts a resume if the file was already partially 
downloaded.
  /stop        Stops on first error (wildcards/FTP only).
  /subdir      Downloads files from sub-folders as well (FTP).
  /timeout     Specifies the timeout in seconds (default: 0, no 
timeout).
  /unescape    Converts escape characters (%%xy) in the destination 
filename.
  /update      Only downloads if local file meet the condition.
                <condition> is either of the following values:
                 date - checks whether local file is older.
                 size - checks whether file sizes are different.
                 both - checks both file dates and sizes (default).
  /useragent   Overrides the default user-agent string with the 
specified one.
  /utf8        Enables UTF-8 support (FTP).
  /?           Displays this help message.