can not see the new operationcontracts

In my wcf project, I can see several operationcontracts
I do not see the new one I have just added i.e.

inside the interface class:

...
...
...

[OperationContract]
void WriteAllSQL(string strXML);

in the .svc.cs file

...
...
...
public void WriteAllSQL(string strXML)
{
...
...
}

On the client, when I create an instance to the wcf, I only see the previous operationcontracts and not the new ones.

Have i not done something correctly?

Have you re-created the proxy-class?

you mean the .svc.cs file inside the wcf project?