Issue with saving signature as BLOB into table about apex-plugin-apexsignature

[AlexisAth]

Hello again ! I have also tried this code on the attributes section of the plug-in:

DECLARE

l_collection_name VARCHAR2(100);
l_clob CLOB;
l_blob BLOB;
l_filename VARCHAR2(100);
l_mime_type VARCHAR2(100);
l_token VARCHAR2(32000);

BEGIN
-- get defaults
l_filename := 'signature_' ||
to_char(SYSDATE,
'YYYYMMDDHH24MISS') || '.png';
l_mime_type := 'image/png';
-- build CLOB from f01 30k Array
dbms_lob.createtemporary(l_clob,
FALSE,
dbms_lob.session);

FOR i IN 1 .. apex_application.g_f01.count LOOP
l_token := wwv_flow.g_f01(i);

IF length(l_token) > 0 THEN
  dbms_lob.writeappend(l_clob,
                       length(l_token),
                       l_token);
END IF;

END LOOP;

-- convert base64 CLOB to BLOB (mimetype: image/png)
l_blob := apex_web_service.clobbase642blob(p_clob => l_clob);

INSERT INTO cc.ibs_emp_signature
(ibs_no,
emp_signature,
bosta_id)
VALUES
(6655,
l_blob,
4455);
END;
But nothing happens...