SQL & PL/SQL :: Send Email Attachment Using Utl_mail.send_raw Utility And Not Successful

I am trying to send an email attachment using "utl_mail.send_raw" utility and not successful. Constantly I keep getting an error:

"ORA-20001: An error has occured: ORA-20001: ORA-06508: PL/SQL: could not find program unit being called
ORA-06512: at "APPOWNER.SANDEEP_CT_FILE", line 103"

I think it's emanating from "ORA-06508: PL/SQL: could not find program unit being called".

a) this morning my production dba " utlmail.sql in DEVELOPMENT as sys.

b) Create or replace directory TEMP_SANDEEP as '/u01/data' (This was created so that BFILENAME could read it + "dbms_lob.fileopen" needs to access this from Oracle directory and not Operating system directory)

c) 'u01/data' exists on Unix development box.

d) Then I created the following procedure to create a text file (text file's name is currentdate.txt i.e. 06062011.txt) that has some information. Once created, the UTL_MAIL.SEND_RAW should pick this file up and email this to concerned parties(and in this case it's me as I am doing this on development environment).

Code for the above is as follows:

CREATE OR REPLACE procedure sandeep_ct_file is
/*Variable declarations */
v_dir_location varchar2(100);
v_file_name varchar2(100);
v_file_handle UTL_FILE.FILE_TYPE;
v_report LONG := chr(10)||'Prog Code' ||' '||
[code]....

Do I have to defined SMTP connections and parameters?