The blank page probably means you have an index.html file as the default document, when I visit www.gcreachrann.ie/Default.aspx I see the error you mention:
XML Parsing Error: no element found
Location: http://www.gcreachrann.ie/Default.aspx
Line Number 1, Column 1:
My best guess is that some files either failed to upload or were corrupted during the upload process, I would try uploading again using a robust ftp client like FileZilla and watch carefully for any transfer errors and retry until all files make it.
Other than that I would set the default document to Default.aspx and make sure the site is configured with the correct version of .NET framework
Hope it helps,
Joe