u need to use POST instead of GET and post with this data:

username=&pword=&usrname=test&uemail=test@test.com&psword=testing&hash=4de01e72701cf8757bdbf0e5e8039bad

However, since its using cookies etc etc thats as far as i can help. That hash= is different every time and i have no clue how its generated either.