Hello muzza, sorry to hear that you cannot access your files. There are user tutorials that might be useful to you.
http://community.wd.com/t5/WD-ShareSpace/HOWTO-Sharespace-RAID-5-Data-Recovery/m-p/287736/highlight/true#M2774
http://community.wd.com/t5/WD-ShareSpace/HOWTO-Recover-files-from-a-RAID-1-mirrored-drive-when-the/m-p/138448/highlight/true#M1790