Please attempt to clear your cache and cookies in Chrome prior to accessing your Mediafire account again. If possible, you may want to attempt to try logging using a different web browser such as Firefox or Internet Explorer or using a different computer. Currently their are 2 files in your account, most recently updated on 4/11/2012.
Please provide us with a few of your file names along with the URL links that are missing from your account so that we can investigate the matter further.
Once you do have access to your account, please ensure that when you are done working on your Mediafire account that you completely log out using the log out from the drop down in the upper right corner when you hover over your email address and then select Sign Out.