Load balancing across backend servers

[#1]

Hi,

When I am trying to pass a url which is in the format

http://base_url/path_suffix; where target serve configurations are as follows

name: target1, host : mocktarget.apigee.net, port : 80, Enabled : true

I am getting the following error:

{"fault":{"faultstring":"The Service is temporarily unavailable","detail":{"errorcode":"messaging.adaptors.http.flow.NoActiveTargets"}}}

my code is as follows:

Please help me to know where i am wrong???

<TargetEndpoint name="default">
    <HTTPTargetConnection>
        <LoadBalancer>
            <Server name="sample1"/>
            <Path>/json</Path>
        </LoadBalancer>
    </HTTPTargetConnection>
</TargetEndpoint>