Hi Rosie,
we never found out what was the cause of Biljana's problem, so once again, we'll have to proceed by trial and error.
First, please make sure you are accessing EPPI-Reviewer from the following URL:
http://eppi.ioe.ac.uk/eppireviewer4/ and not https://eppi.ioe.ac.uk/eppireviewer4/ (the second one starts with "https")
Second, if you can, try using a different browser. On Macs you can use Firefox and Safari, on PCs, Internet Explorer and Firefox will work with EPPI-Reviewer.
Third, if you have a second computer to try at home, please do. If the catch-all solutions above don't work, we will have to try to isolate the cause of the problem. The primary suspects are your home computer and your home network (two subdivisions: your local network within your home as opposed to your broadband connection). Thus, trying a different computer at home would tell us where to look. Also, in case you are using a laptop, you could try bringing it into work and try accessing EPPI-Reviewer through your work connection, if that works, we'd know it's your home network that is somehow interfering.
Still on the same line of reasoning, in case you are using your home connection via WiFi, it may be worth trying to connect to your broadband router directly with an ethernet cable: does the problem go away?
In all cases, please report back (here or to eppisupport@ioe.ac.uk) and let us know what you were able to try and whether it made a difference. Please also let us know more about your home computer (what type, what operative system, what browser, etc).
Many thanks and apologies for the inconvenience,
Sergio