Bread-Bakers v100.n002.15

greetings & Happy New Year to all!
every once in a while I have a little bit of time & consider making dough 
(especially pizza dough) to freeze for some later time -when I tried this, 
however, when I defrosted the pizza dough & it looked _awful_ & didn't 
rise....what am I doing wrong? it's a fairly normal pizza dough recipe as far 
as I can tell & works wonderfully when fresh (Mr Food's thick crust pizza 
dough)....
thanks for any help
Robin