Galhano //127.0.0.1

Find the file: arcGisServer/System/Server/server.dat

on ArcGis 10.0 might be in:

C:\Program Files (x86)\ArcGIS\Server10.0\server\system

and change the option to false, restart SOM, on services.

server.dat file:

--------------------------------------
<Server>
    <SecurityEnabled>false</SecurityEnabled>
    <ServerMachines>
        <Machine>
            <Name>myserver</Name>
            <Description></Description>
            <Capacity>-1</Capacity>
        </Machine>
    </ServerMachines>
    <ServerDirectories>
        <Directory>
            <Path>c:\arcgisserver\arcgiscache</Path>
            <URL>http://myserver/arcgiscache</URL>
            <Description></Description>
            <Type>cache</Type>
        </Directory>
        <Directory>
            <Path>c:\arcgisserver\arcgisjobs</Path>
            <URL>http://myserver/arcgisjobs</URL>
            <Description></Description>
            <Type>jobs</Type>
            <Cleaning>sliding</Cleaning>
            <MaxFileAge>21600</MaxFileAge>
        </Directory>
        <Directory>
            <Path>c:\arcgisserver\arcgisoutput</Path>
            <URL>http://myserver/arcgisoutput</URL>
            <Description></Description>
            <Type>output</Type>
            <Cleaning>sliding</Cleaning>
            <MaxFileAge>600</MaxFileAge>
        </Directory>
    </ServerDirectories>
    <Properties>
        <LogPath>C:\Programas\ArcGIS\server\user\log\</LogPath>
        <LogLevel>2</LogLevel>
        <LogSize>10</LogSize>
        <ConfigurationStartTimeout>300</ConfigurationStartTimeout>
        <EngineContextTimeout>600</EngineContextTimeout>
    </Properties>
</Server>