http://www.example.com/?s2member_file_download=access-s2member-level0/tiger.doc
http://www.example.com/?s2member_file_download=access-s2member-level1/zebra.pdf
http://www.example.com/?s2member_file_download=access-s2member-level2/elephant.doc
http://www.example.com/?s2member_file_download=access-s2member-level3/rhino.pdf
http://www.example.com/?s2member_file_download=access-s2member-level4/lion.doc