How do I save a response.

How do I save a response.

On my site monitor I see 

"Home Page is in Trouble" ...
"The String ""Exception" "SQLException" "Error"" is present in the response"

However when I look at the page it looks fine. I look at the page source and it doesn't contain any ot these strings. I try again and again and I never see any of them.

So what I really want to do is ask the monitor to save a few of the responses so I can see what is going wrong. So I can see the error that the monitor sees. How can I do this?

Jos