Help Required on Google Chrome

Hi, I use chrome regularly as I run Evolution through it. For last 2 weeks I cannot get in to the markets - correct score, horse racing etc. I have noticed that when I log in I get a red message with HTTP with a cross through it that seems to indicate a security issue. I have gone "under the bonnet" on chrome and deleted history but still no joy. It does not affect the evolution but I often like to look at the main interface. I have no problem with Outlook express just chrome.
Can anyone offer any advise on this ? Many thanks in advance. Cheers.