FTP log in info can not be modified to update plug ins and themes

I have a word press site that I am stuck on.

When I want to update plug ins, it always fails because the name and the password are wrong for the FTP server. This happened when I moved my site to a new server.

It says that my credentials are wrong and leaves two fields where you should be able to type in the new information.

Problem, my fields are there, but I can type nothing in them. I can not place my cursor in these fields.

Ideas?

Thanks

Joseph