initlocation - server restart

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

postgres(at)vogon:~ > export PGDATA2="/home/jochen/data"
postgres(at)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(at)vogon:~ > nohup postmaster -i &
[1] 17270
postgres(at)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 * | | .
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. Department of Geography phone +49/0228/739646 | | | | * .
. University of Bonn fax +49/0228/739099 | |_| | | |.
. Meckenheimer Allee 166 jochen(dot)schmidt(at)uni-bonn(dot)de \___ |_| |.
. D - 53115 Bonn http://slide.giub.uni-bonn.de/~jochen | ___/.
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