If the channel is encrypted, you cannot get it with a QAM tuner. See the following thread. I believe Shaw encrypts all their channels now (SD & HD) so you need their STB (SD or HD if you want HD).
http://www.digitalhome.ca/forum/showthread.php?t=32271
Then see: http://www.digitalhome.ca/forum/showthread.php?t=57741
http://www.digitalhome.ca/forum/showthread.php?t=32271
Then see: http://www.digitalhome.ca/forum/showthread.php?t=57741