Customers can't log in

1.3.9h
Fresh install/godaddy.com(I know they suck, now)
Added Mostly Grey Template
https://www.insanespeedmotorsports.com/store

I can get a new account to log in but not a past account.
I keep getting a error that the user name and password to not match. I have emails from past customers saying that they have requested a new password and the new one does not work.
I have tried the FAQ suggestions and nothing is working.
I have been searching for hours and cannot resolve this issue.
Please help!!!!
Thanks
Steve

Also, if you need me to post something as in site details, please advise me in what folders they are, I am still learning.

I appreciate all help!!!

1.3.9h
Fresh install/godaddy.com
I suppose you used their installer also???

Try a manual install

If I did a manual install, can I install it over what I have now so I do not lose what took me forever to get done, lol.
I was hoping it was a php issue, I was trying to find the templates that make sure everything is pointing to where it should, what I found it was but there seems to be a difference from 1.3.8 to 1.3.9 so some of the user issues that I found did not apply.
I appreciate your fast response.