"Maybe someone deleted the file from your web server" is as good an answer as any other since you didn't tell us how it fails. In fact, you didn't even tell us it's failing! What is does it return to the browser? What does it put in the error log? What was returned by LWP in $response?

By the way, please add <readmore>...</readmore> around the code in the OP. It's too large.