ResolveEndpointFailedException with a file endpoint

[/U]

I have a simple route transferring contents of files
in a folder to a JMS queue:


        <camelContext
xmlns="http://activemq.apache.org/camel/schema/spring";>
                <route>
              <from
uri="file:///ftp/data/in.txt/?useFixedDelay=true&amp;delay=1000&amp;"/>
              <to uri="jms:queue:mytopic.publish"/>
            </route>
        </camelContext>

When I start the context, it fails with the exception shown below. 
why these parameters are not recognized? please help!

        
org.apache.camel.ResolveEndpointFailedException: Failed to resolve endpoint:
file:///ftp/data/in.txt/?useFixedDelay=true&delay=1000& due to:
org.apache.camel.ResolveEndpointFailedException: Failed to resolve endpoint:
file:///ftp/data/in.txt/?useFixedDelay=true&delay=1000& due to: There are 2
parameters that couldn't be set on the endpoint. Check the uri if the
parameters are spelt correctly and that they are properties of the endpoint.
Unknown parameters=[{useFixedDelay=true, delay=1000}]
        at
org.apache.camel.impl.DefaultCamelContext.getEndpoint(DefaultCamelContext.java:351)
        //...

/U
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