radiobuttonlist

Question

hi,

 I have a radiobutton list in gridview with three radiobuttons,  text of the radio button which is selected to be inserted in to textbox which is in gridview of next page.

i tried by giving,  

 session["paid"] = radiobutton1.selecteditem.value.

i have given in next page as,

int paid1;
paid1 = (int)Session["paid"];

but i am getting a runtime error.

plz give  me a solution.
is what i had written is wrong?

plz help me.

thanks in advance.