Need help with a Java-SQL connection

My classmates and I created a DesktopFrame. Within it are reports that require a connection to an MS Access Database. When a report in an InternalFrame is opened: the SQL command works, there is a connection, and everything goes well on the first run.
However, when another InternalFrame is opened or when the same InternalFrame is opened the 2nd time, an error occurs. It produces a java.sql.SQLException: General Error.
Can anyone help me? Thanks in advance.

Provide more info, maybe even some code segments. (Not all). May be easier to help

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    DURATION_FRAME 9 NUMBER (2) N
    REAL_TIME 6 NUMBER (10) N
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    thanks

    thanks carl ,
    i changed it to:
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    the sentence will be:
    i love develope oracle htmldb application .
    now if i do that i'm getting:
    i love oracle htmldb application develope.
    i hope you get my point.
    thanks

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