LIKE problem

Hi Everybody! I'm asking you, because recently I have some problems with the
LIKE so I test with an easy and simple query but doesn't work:

SELECT *
FROM employee
WHERE id like 'h%';

The error says:
"ERROR: operator does not exist: integer ~~ unknown

LINE 5: WHERE id like 'h%';

^

HINT: No operator matches the given name and argument type(s). You might
need to add explicit type casts.

********** Error **********

ERROR: operator does not exist: integer ~~ unknown

SQL state: 42883

Hint: No operator matches the given name and argument type(s). You might
need to add explicit type casts.

Character: 34"

I don't know why because I did before more difficult querys and works well.
What is the problem?

Thanks a lot

JP Cook