Unable to write files in different m/c in LAN using utl_file package

I need to dump some files generated by utl_file package in a separate m/c not in the db server.For that I tried using utl_file_dir='*' and mapped the specified directory in the db server. but its failing as show below..
ORA-29283: invalid file operation
ORA-06512: at "SYS.UTL_FILE", line 449
ORA-29283: invalid file operation
ORA-06512: at "ANIRBAN.WRITE_IN_FILE", line 9
ORA-06512: at line 1
The prototype sp is given below..
CREATE OR REPLACE PROCEDURE write_in_file(pInDir IN VARCHAR2,
pInFileName IN VARCHAR2,
pInFileContent IN VARCHAR2) IS
vFile UTL_FILE.FILE_TYPE;
vFileName VARCHAR2(20) := pInFileName;
BEGIN
dbms_output.enable(1000000);
vFile := UTL_FILE.FOPEN(pInDir, vFileName, 'w', 32000);
UTL_FILE.PUT_LINE(vFile, pInFileContent);
UTL_FILE.FCLOSE(vFile);
END write_in_file;
With this sp i'm able to write in genuine drives but not in mapped one.What shall be done to be able to write in a separate m/c freely.Plz guide me

And make sure you specify the full path name of the server/directory path rather than using substituted drive names as is can sometimes be funny about that sort of thing.

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From Asktom
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Unable to write files in different m/c in LAN using utl_file package

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