Thanks for the replies folks:
1. I do not add a space at the end of the cut. In fact, every one of the new passwords I have been sent works the first time. The second time they do not work even if I type them in manually.
2. Over the period of time I have been using the Windows 7 Forums services (AT least seven years)I have changed my password at least three times and after a period of time I get the response that the system does not recognize it. In this latest case I have been using passwords mailed to me because when the system refused to recognize my latest password and I went in to change it, I entered the same password as I had been using. I got a message telling me the password was in use. Now, how my old password can be in use and not recognized beats me. In addition my e-mail address has remained unchanged for five years.