403 Forbidden

The "403 Forbidden" error comes from the web server when it refuses to service your request. From the HTTP specification:

403 Forbidden

The server understood the request, but is refusing to fulfill it.

Authorization will not help and the request should not be repeated.

If the request method was not HEAD and the server wishes to make

public why the request has not been fulfilled, it should describe

the reason for the refusal in the entity body. This status code is

commonly used when the server does not wish to reveal exactly why

the request has been refused, or when no other response is

applicable.

Take a look at the transferredData after this error occurs and see what it says. There may be a clue there as to why you are getting this. Alternatively, check to make sure your user and password are valid for the resource you're trying to retrieve. Also, if you are using a tunneling proxy, rule it out by not using it if you have that option.