I am migrating my database from 9.2.0.5 and 10.2.0.5

hello gurus;

        I am migrating my database from 9.2.0.5 to 10.2.0.5, and i decided to upgrade my database manually because by dbua.
because when I try on the last screen display to click on "NEXT" it's not possible. I just have "BACK" and "Finish" therefore I have choosen to the upgrade manually.

I have setup all my parameters :

export ORACLE_SID=OAPROD
export ORA_NLS10=$ORACLE_HOME/nls/data/9idata
unset TNS_ADMIN
export PATH=$ORACLE_HOME/bin:$PATH
export PATH=$ORACLE_HOME/OPatch:$PATH
export SHLIB_PATH=$ORACLE_HOME/lib
export LD_LIBRARY_PATH=$ORACLE_HOME/lib

>>>>>> When I execute sqlplus /nolog