MVC4：SQL登录失败。错误代码1.仅发生在一个页面上

I have just come across what has to be one of the weirdest (and most frustrating) errors ever. I have a site which has just been put onto a staging server (not yet live). Everything seems to be working fine except one particular page. There is a method being called which invokes a stored procedure, but I am getting a I have just come across what has to be one of t