Nicky,
Sorry you all are still having problems.
Did you try deleting your ranchers cookies? If not, right click on Start, left click on Explore, and find a folder called Cookies. It's usually, but not always under the Documents and Settings folder and in the "Your Name" folder. When you find it go down until you find one or more cookies with 'ranchers' in their name. Delete all.
I'm not sure why you are having problems. Since you tried Chrome, it has to be a problem with Windows or a setting in Windows or your ISP. I really don't know what I can do other than install the new version of phpBB that cattletoday.com is using, and I really don't want to do that.
Sometime when you are somewhere and can borrow a computer try logging on and see what happens.