Siverlight Textbox

I am trying to get the input text from the textbox, At the moment when i am deugging datacontext is null for somereason, can someone assist me?

after getting the data from the textbox, i want to assign it the textblock on my next page

uutmanager.Information = richTextBoxInformation.DataContext.ToString();


textBlockUutInformation.DataContext  = uutmanager.Information;