I had the same problem, got it working by "binding" de service with the service behaviour by doing this :
Gave a name to the behaviour
<serviceBehaviors> <behavior name="YourBehaviourNameHere">
And making a reference to your behaviour in your service
<services>
<service name="WCFTradeLibrary.TradeService" behaviorConfiguration="YourBehaviourNameHere">
The whole thing would be :
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<system.web>
<compilation debug="true" />
</system.web>
<!-- When deploying the service library project, the content of the config file must be added to the host's
app.config file. System.Configuration does not support config files for libraries. -->
<system.serviceModel>
<bindings>
<basicHttpBinding>
<binding name="basicHttp" allowCookies="true"
maxReceivedMessageSize="20000000"
maxBufferSize="20000000"
maxBufferPoolSize="20000000">
<readerQuotas maxDepth="32"
maxArrayLength="200000000"
maxStringContentLength="200000000"/>
</binding>
</basicHttpBinding>
</bindings>
<services>
<service name="WCFTradeLibrary.TradeService" behaviourConfiguration="YourBehaviourNameHere">
<endpoint address="" binding="basicHttpBinding" bindingConfiguration="basicHttp" contract="WCFTradeLibrary.ITradeService">
</endpoint>
</service>
</services>
<behaviors>
<serviceBehaviors>
<behavior name="YourBehaviourNameHere">
<!-- To avoid disclosing metadata information,
set the value below to false and remove the metadata endpoint above before deployment -->
<serviceMetadata httpGetEnabled="true"/>
<!-- To receive exception details in faul`enter code here`ts for debugging purposes,
set the value below to true. Set to false before deployment
to avoid disclosing exception info`enter code here`rmation -->
<serviceDebug includeExceptionDetailInFaults="true" />
</behavior>
</serviceBehaviors>
</behaviors>
</system.serviceModel>
</configuration>