[users] re; spread sheets...

[eleanor wilkinson]

i have just joined this site through a cd i bought from your site. i have been 
trying to go a spread sheet for my work that comes to me throught excell.. i 
fill in my numbers and it auto calculates.. but i am finding that it doesnt do 
the calculation automatically and i dont know how to fix it... can you help me 
please..
  elleoaka