pg_restore problems

Hi,
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I am trying to restore data from a production server (using Postgresql
7.3.x) to a test server using the latest release 7.4.1.
This is what I did:
1) dropdb -U postgres testdb
2) createdb -U postgres testdb
3) pg_restore -U postgres -O -d testdb data.tar
It throws this error:
pg_restore: [archiver (db)] could not execute query: ERROR:  could not
find function "dblink_tok" in file "/usr/local/pgsql7.4.1/lib/dblink.so"
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Any input would be appreciated.
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thanks
Roopali Sharma
Software Engineer
Waterford Institute
Phone: 801.938.1713=20
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