trigger errors

hi again,

i created a trigger on a table for insert or delete, and a function that
gets created fine.

however when i go to insert something into the table i get

NOTICE: plpgsql: ERROR during compile of create_count_cache near line 2
ERROR: parse error at or near ";"

definitions follow(this is the exact syntax and order i used to create the
function table and trigger, all other tables in referenced do exist and have
ALL permissions turned on for the user)

CREATE FUNCTION create_count_cache()
RETURNS opaque AS
'
BEGIN;
DELETE FROM LangCount;
INSERT INTO LangCount SELECT LangID as ID, COUNT(LangID) AS CNT
FROM snippet GROUP BY LangID;
DELETE FROM CatCount;
INSERT INTO CatCount SELECT LangID as ID, COUNT(LangID) AS CNT FROM
snippet GROUP BY LangID;
COMMIT;
'
LANGUAGE 'plpgsql';

CREATE TABLE snippet (
UserName VARCHAR(12),
LangID INT,
CatID INT DEFAULT 0,
name VARCHAR(30),
snippet TEXT);
grant ALL ON snippet to codelibrary;

CREATE INDEX front_select ON snippet (UserName, LangID, name);
CREATE INDEX cat_select ON snippet (UserName, CatID, name);

CREATE TRIGGER count_change
AFTER DELETE OR INSERT ON snippet FOR EACH ROW
EXECUTE PROCEDURE create_count_cache();

i then call

insert into snippet (UserName, LangID, name, snippet)
values ('mbritten', 1, 'my snippet', 'int i = 0;');

and get the error.

thanks for your time,

marc britten