Upgrading user tables with NCHAR columns in 10.2.0.1

Hi,
we have upgraded our database to 10.2.0.1 from 8.1.7.4 through DBUA
Before upgradation our database was having WEISO8895P1 Character Set and WEISO8895P1 National character set.
In 10g we are having WEISO8895P1 Character Set and AL16UTF16 National character set.
Now to upgrade user tables with NCHAR columns, we have to perform the following steps to run the scripts :
SQL> SHUTDOWN IMMEDIATE
SQL> STARTUP RESTRICT
SQL> @ utlnchar.sql
SQL> @ n_switch.sql
SQL> SHUTDOWN IMMEDIATE
SQL> STARTUP
But when i query for the NCHAR or NVARCHAR2 or NCLOB datatype for verification, the NCHAR columns in the user tables have not been upgraded, it still remains the same.
Kindly suggest for the same.
Regards
Milin

Kindly explain or post the following
- the 'query' you used after 'upgradation' (a word not occurring in any dictionary and probably specific to the Hindi-English) for 'verification'
- what result you expected
- what 'still remains the same' means
Kindly consider no one is looking over your should. If you don't plan to post anything other than 'It doesn't work', paid support might be a better option for you.
Volunteers like we are not being paid to tear the information out of you.
Sybrand Bakker
Senior Oracle DBA

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