Tersus cannot find the postgres jdbc driver.
You can download it from http://jdbc.postgresql.org/download.html#others (make sure you download the 8.1 version of the JDBC 3 drive.
The file should be placed in the [JRE Root]/lib/ext folder. To find out the location of JRE Root, open the studio, select Help -> About... -> Configuration Details, and look for the jre.home variable.
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