update problem in triggers

[Jamie Deppeler <jamie@xxxxxxxxxxxxxxx>]

I am having with this simple trigger i wrote, worked when i created it 
but now i get this error  "Stack depth Limit Exceeded"

If someone could tell me what i am doing wrong i would be greatfull


Trigger

CREATE TRIGGER "updateKeys" AFTER UPDATE
ON "projects"."resource" FOR EACH ROW
EXECUTE PROCEDURE "projects"."setParentKeysResourceUpdate"();

Function

CREATE OR REPLACE FUNCTION "projects"."setParentKeysResourceUpdate" () 
RETURNS trigger AS
$body$
declare
projectcursor refCursor;
prop RECORD;
begin
       if new.fkproject is null then
            open projectcursor FOR SELECT * from projects.component 
WHERE projects.component."primary" = new.fkcomponent;
            FETCH projectcursor into prop;
            update projects.resource set fkproject = prop.fkproject, 
fkproposition = prop.fkproposition, fkjob = prop.fkjob where 
projects.resource."primary" = new."primary";
            close projectcursor;
       end if;
 return null;
end;
$body$
LANGUAGE 'plpgsql' VOLATILE CALLED ON NULL INPUT SECURITY INVOKER;

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