I'm using the standard connection mode. But I'm getting access denied from the server. The server is an external one, and I am using the xmlHttpRequest.
Is there a piece of code that I have to put on my server or on my client to make thinks work?
This is very important to me because I can't advance in my work and I don't know what to do.
Thank you.

Some external servers (Google is a good example) require that you pass them an identifier (typically, a GUID) as "authentication" that you are authorized to get the data. With no valid authentication, you get nothing (or an error).

Others look at the browsers "HTTP_USER_AGENT" string and decide what to send back based on what browser the user has. If you don't give them a User Agent that they recognize, they give you back nothing (or an error).

Others (ASP and JSP based servers are good examples) are expecting a Cookie that identifies the particular user (e.g, sessionid in the case of ASP). If you don't give them a valid cookie, they give you back nothing (or an error).

So...

I don't know that we can help you without knowing more about the server from which you are trying to get the info.