Requesting a specific web page

I am using 'Web' to make a http request to an Arduino micro controller.
It is working but not as I want.

It appears as though the 'set Web1 URL to' block has absolutely no effect.
You will notice that at the end of the IP address of my Arduino I have appended text from the function parameter
However when I receive the HTTP request on my Arduino all I see is a blank 'GET' request.
If the HTTP request was made from a web browser I would see 'GET /TANK' on my Arduino for example.

So how do I make this work as intended?