database export

Define a log file and see there for error messages.

well..  that's 2 questions..  let's start with the first one.
   1)  is the database running
   2)  is the listener running
   3)  can you connect
   4)  can you connect "as sysdba"

ok the database is running and the listener too. I could connect as user and  as sysdba too.

now, do what schwertner says above

exp userid=user/pass file=c:\dump.dmp log=c:\log_file.log full=y

this is the log file
log.log

SQLNET.AUTHENTICATION_SERVICES = (NONE)


Also
http://oradbatips.blogspot.com/2008/01/tip-69-export-hangs-shutdown-immediate.html

All of the next runs of exp and expdp hung same as before bounce.
Eventually, I found that problem was because of improper setting of LD_LIBRARY_PATH and LIBPATH.This parameter needs to be set to point to $ORACLE_HOME/lib in 10g as first reference. Setting those parameter properly fixed the situation including shutdown problem and exp/expdp problem. (For more info, please refer to metalink note : 351650.1).

how can be set these parameters properly to fix it?

The first is in sqlnet.ora file.

LD_LIBRARY_PATH and LIBPATH are environment variables.
In windows - find them in Registry
In Unix - in profile of the Oracle user.

i drop two user in database CTXSYS and DBMX and the export was ok!!!!