initlocation - server restart

hi
i have the following problem on my Linux, PostgreSQL 6.5.1:

postgres@vogon:~ > export PGDATA2="/home/jochen/data"
postgres@vogon:~ > initlocation $PGDATA2
We are initializing the database area with username postgres (uid=26).
This user will own all the files and must also own the server process.

Creating Postgres database system directory /home/jochen/data/base


postgres@vogon:~ >  nohup postmaster -i &
[1] 17270
postgres@vogon:~ > createdb -D $PGDATA2 bla
ERROR:  Unable to locate path '/home/jochen/data/bla'
        This may be due to a missing environment variable in the server
createdb: database creation failed on bla.

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I read through the archives but couldn't find an answer to my problem...
thanks in advance, jochen

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.                                                                    *     .
. Dipl. Geogr. Jochen Schmidt                                    *  | |    .
.                                | | | |    .
.   Department of Geography      phone +49/0228/739646          | | | |  * .
.     University of Bonn         fax   +49/0228/739099          | |_| | | |.
.   Meckenheimer Allee 166     jochen.schmidt@uni-bonn.de       \___  |_| |.
.      D - 53115 Bonn     http://slide.giub.uni-bonn.de/~jochen     |  ___/.
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