Simple_correlator with no outputs

Hello, I’m now testing gr_simple_framer and gr_simple_correlator
Thus I have just made simple flow graph for it.

[image: framer_correlator_test.png]
Image:
http://dl.dropbox.com/u/11382666/for_gnuradio_mailinglist/framer_correlator_test.png

When I run it, gr_simple_framer works well, but gr_simple_correlator
gives
nothing.
It does not output neither a recovered signal or junk. Literally, it
gives
nothing.

Currently I use GNU Radio 3.4.0 built by build-gnuradio script on Ubuntu
10.10