Log user name and password to text file from form

We have a very old client that is having problems trying to log in to a website. At the moment we think the user is not entering a correct username.

The site is in ASP does an开发者_开发百科y one have any code that I could borrow that would be able to log and write down whats posted and then post that user name and password to the normal submit function.

Send the old client an email asking him what his username is. He'll probably mistype it in his reply the same way he mistypes it in the web form.

Give him a call, and tell him to spell out each letter/keystroke as he tries to log in.