Oracle 10g export/import charset problem

I have got two Linux Debian Servers with Oracle 10g:

————-Server 1:
ii  oracle-xe                         10.2.0.1-1.1                        Oracle Database 10g Express Western European
ii  oracle-xe-client                  10.2.0.1-1.2                        Oracle Client 10g Express Edition

NLS_LANGUAGE                   AMERICAN
NLS_TERRITORY                  AMERICA
NLS_CHARACTERSET               WE8MSWIN1252

————-Server 2:
ii  oracle-xe-client                  10.2.0.1-1.0                        Oracle Client 10g Express Edition
ii  oracle-xe-universal               10.2.0.1-1.0                        Oracle Database 10g Express Universal Editio

NLS_LANGUAGE                   AMERICAN
NLS_TERRITORY                  AMERICA
NLS_CHARACTERSET               AL32UTF8

I want to export all the user ‘X’ tables from Server 1 to Server 2. I do this:

Server 1:
$ export NLS_LANG = NLS_LANG=AMERICAN_AMERICA.WE8MSWIN1252
exp user/password file=export.dmp

I receive this:
Connected to: Oracle Database 10g Express Edition Release 10.2.0.1.0 – Production
Export done in AL32UTF8 character set and AL16UTF16 NCHAR character set
server uses WE8MSWIN1252 character set (possible charset conversion)
….
Export terminated successfully without warnings.

Server 2:
$ export NLS_LANG = NLS_LANG=AMERICAN_AMERICA.WE8MSWIN1252
imp user/password file=export.dmp FULL=Y

AND THE PROBLEM is that I receive this:
Export file created by EXPORT:V10.02.01 via conventional path
import done in WE8MSWIN1252 character set and AL16UTF16 NCHAR character set
import server uses AL32UTF8 character set (possible charset conversion)
export client uses AL32UTF8 character set (possible charset conversion)

AND A LOT OF ERRORS LIKE THIS:
IMP-00019: row rejected due to ORACLE error 12899
IMP-00003: ORACLE error 12899 encountered
ORA-12899: value too large for column “EE”.”ESC_AVISOS”.”MENSAJE” (actual: 501, maximum: 500)
Column 1 1254
Column 2 Prueba ddffsd
Column 3 Prueba prueba:….campeón prueba pru…
Column 4 21
Column 5 04-AUG-2002:20:45:00
Column 6 04-AUG-2002:20:00:00
Column 7 0
Column 8 S
Column 9 0
Column 10 N

I have tried to convert the charset on the Server 2 with: “ALTER DATABASE CHARACTER SET WE8MSWIN1252; ” but I receive and error message because WE8MSWIN1252 is not a superset of AL32UTF8.

What can I do?
Thanks.

http://www.experts-exchange.com/Database/Oracle/10.x/Q_22813242.html