Function with table Valued Parameters execution issue

Hello,

I am new one in Postgres and am using pgAdmin III for postgres tools.
I have created data type which replicates data table in our application and created one function with table valued parameter. I have tried lots of solution but, am not able to achieved my goal.
I would like to know how to call or execute function with table value parameter in Postgres.

I have defined type like this:

CREATE TYPE "CategoryType" AS
("CATEGORY_NODE_ID" text,
"PARENT_ID" text,
"CODE" text,
"DESCRIPTION" text,
"SEQUENCE_NUMBER" integer,
"ACCOUNT_GROUP_ID" integer,
"FINANCIALREPORT_CATEGORY_ID" integer,
"FINANCIALREPORT_DETAIL_ID" integer);
ALTER TYPE "CategoryType"
OWNER TO postgres;

I have defined following function:

CREATE OR REPLACE FUNCTION "CategoryBulkImport"(_tbl_type "CategoryType")
RETURNS
TABLE (
"CATEGORY_NODE_ID" text,
"PARENT_ID" text,
"CODE" text,
"DESCRIPTION" text,
"SEQUENCE_NUMBER" integer,
"ACCOUNT_GROUP_ID" integer,
"FINANCIALREPORT_CATEGORY_ID" integer,
"FINANCIALREPORT_DETAIL_ID" integer
)
AS
$BODY$
SELECT "CATEGORY_NODE_ID", "PARENT_ID", "CODE", "DESCRIPTION", "SEQUENCE_NUMBER",
"ACCOUNT_GROUP_ID", "FINANCIALREPORT_CATEGORY_ID", "FINANCIALREPORT_DETAIL_ID"
FROM _tbl_type;
$BODY$
LANGUAGE sql VOLATILE
COST 100;
ALTER FUNCTION "CategoryBulkImport"("CategoryType")
OWNER TO postgres;

Here I want to use table type parameter(_tbl_type) inside function with select statement but not able to access it so please suggest me a way.
Here I am not sure about my function so please correct me if I am wrong.

Thank you.

Best Regards,
Kanji Kanzariya