SQL & PL/SQL :: External Table And Spanish Characters

I am having difficulty importing Spanish text files into my Oracle 11g XE database. Below is my external table declaration code. The external file is attached.

CREATE OR REPLACE DIRECTORY xtern_data_dir AS 'C:/.../';

CREATE TABLE ET_SLBLWD0_SPNSH_DESC (
LBL_WARN VARCHAR(4),
LBL_TXTSNS NUMBER(2),
LBL_DESCS VARCHAR2(55),

[Code]...

All 406 rows seem to import fine, but do not display the Spanish accent characters correctly. Note the strange characters:

SQL> SELECT count(*) FROM ET_SLBLWD0_SPNSH_DESC;

COUNT(*)
----------
406

SQL> select * from et_slblwd0_spnsh_desc;

LBL_ LBL_TXTSNS LBL_DESCS L L L L
---- ---------- ------------------------------------------------------- - - - -
0001 1 Puede causar somnolencia. El alcohol puede intensificar
0001 2 este efecto. Tenga cuidado cuando conduzca veh¿los
0001 3 automotores u opere maquinaria peligrosa.
0002 1 Importante: Acabe todo este medicamento a menos que
0002 2 quien le escriba la receta le indique lo contrario.

[Code]...

I tried modifying my external table declaration by adding CHARACTERSET WE8ISO8859P1 and CHARACTERSET WE8MSWIN1252, but that just seems to cause the system to throw out ALL the rows containing Spanish characters:

COUNT(*) ---------- 197

SQL> select * from et_slblwd0_spnsh_desc;

LBL_ LBL_TXTSNS LBL_DESCS L L L L
---- ---------- ------------------------------------------------------- - - - -
0001 1 Puede causar somnolencia. El alcohol puede intensificar
0001 3 automotores u opere maquinaria peligrosa.
0002 1 Importante: Acabe todo este medicamento a menos que
0002 2 quien le escriba la receta le indique lo contrario.
0005 1 Debe tomar este medicamento con mucha agua.
0006 1 Puede descolorar la orina o las heces.

[Code]...

The log file specifies the following error on the bad rows:

error processing column LBL_DESCS in row xxx for datafile ...SLBLWD0_CRLF.TXT ORA-12899: value too large for column LBL_DESCS (actual: 55, maximum: 55)

What can I do to import these Spanish characters correctly?