I am not sure I understand so please forgive my ignorance - are you saying that you can get the trades page up, but when you try to scroll down or use the mouse wheel to scroll down it changes to an error page?
Very strange, I have pulled up the trades page and can scroll with no problems at all - if you haven't done one in a while you might want to try a windows update just to make sure everything is up to date with your machine,
I am not sure what is causing this and I cannot reproduce it - can you try an update just to make sure and restart your machine to see what see if this clears what is happening at your end?
I have downloaded updates manually but still wont scroll. when i put the arrow on the scroll bar and click it turns into an hourglass and error message appears