Chrome and Flash

[TechSupp]

We want to use Chrome as a browser for access to Education City activities. It works fine in IE but just tried it in Chrome and although the main site loads up fine, when an activity is selected it appears matchbox size at the top of the page. It looks to be a flash based activity (its up to date on the PC) and although matchbox size it is working! Any idea what needs to be done. Have had a look at the settings in chrome and we content is set to 100% already.