SQL & PL/SQL :: Create Trigger Which Will Test Database Link?

I want to create a database trigger which will test the database link, if it is ok then it will use dblink and do its work.

If it fails then it will send the data into its own server logfile.

I Wrote:

CREATE OR REPLACE TRIGGER PERMIT.TESTTRG
AFTER INSERT OR UPDATE
ON PERMIT.TR_LP_M_H_COMPANY_25072012
REFERENCING NEW AS New OLD AS Old
FOR EACH ROW
Declare
l number; nIgn PLS_INTEGER; nRows PLS_INTEGER := 0;

[code]....

When I execute it it is giving error:

LINE/COL ERROR
-------- -----------------------------------------------------------------
4/11 PLS-00201: identifier 'EXEC_SQL.CONNTYPE' must be declared
4/11 PL/SQL: Item ignored
8/2 PLS-00320: the declaration of the type of this expression is
incomplete or malformed

[code]....