Failed to open ODK aggregate server webpage

my ODK aggregate server url is http://odk123.nat123.net/ODKAggregate/.
both downloading form and uploading form is ok. but when I CLICKed THIS
URL, the first redircton page index(as pic1.png shown) appeared,then the
second page(as pic2.png shown) appeared .the second page is incomplete. why
? what resulted in it? what should i do ?