ResultSet is FORWARD_ONLY.

Hi everyone,
    Recently we have upgraded postgres driver jdbc4 for 8.3. After that while executing rst.first(), it raise the exception.
The statment was created correctly as
dbconnection..createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE,ResultSet.CONCUR_READ_ONLY);

org.postgresql.util.PSQLException: Operation requires a scrollable ResultSet, but this ResultSet is FORWARD_ONLY.
        at org.postgresql.jdbc2.AbstractJdbc2ResultSet.checkScrollable(AbstractJdbc2ResultSet.java:207)
        at org.postgresql.jdbc2.AbstractJdbc2ResultSet.first(AbstractJdbc2ResultSet.java:292)
        at org.apache.tomcat.dbcp.dbcp.DelegatingResultSet.first(DelegatingResultSet.java:326)


This statment worked in postgres 8.1 jdbc 3 driver but now its not.. Pleas help is solving this...

-Arvind S