WALD param style of headder is not treated as a headder

Thanks for that I see that in the put method parameters but I couldn't see that in the request (which is where I was looking). It appears to work as a standard header but, it is URL encoding the content which is not correct for the authorisation header. I've created a script that adds the 'basic' key word and base 64 encodes the supplied password. Is there another way to do this with passwords that change for each request?

Thanks for your help