Obviously blog is about enabling Metadata publishing 😉 just follow me :$ for couple of steps
Add <behavior> like below
<serviceMetadata httpGetEnabled=”true” />
<service name=”BLL.CategorySrv” behaviorConfiguration=”metadataBehavior”>
<endpoint address=”mex” binding=”mexHttpBinding” contract=”IMetadataExchange” />
rest leave as it is 😉 but follow with some brain 😀 coz u would need to change text in bold according to your web service Name (namespace, class name) and base address most probably.
best of luck