Queries seem to lock up shell session

I have installed Cygwin/PostgresSQL on a Win2000
machine and things seem to be operating correctly
except for one thing. When I try to run a query from
the command prompt, the results are returned (after
much blank space) just before the word END. Nothing I
do at this point seems to have any effect on the
system. I cannot ctl-C out and eventually have to
shut down the shell. I am able to create a DB, create
a table in that DB and insert data at will, it would
seem. As soon as I try to see the data, I get the
above result. What have I done wrong?

Thanks!
Travis

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