ADF BC , lock the rows sometimes and do release it

Hi
thank you for reading my psot
i think ADF BC sometimes lock my Rows in table and does not allow other to change them , sometimes the lock goes too long time without any reason
(a record insert lock the rows until i restart the APPS) i should say that during record insert and commit may some exception occurs that prevent the ADFBC to commit the changes.
should it be like that ?
thanks

Are you seeing this problem in the Business Components tester?
Can you reproduce in a simple case?
Is there a specific JBO error appearing?
Regards
Grant Ronald
Oracle Product Management

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I'll make the changes that you suggest.(after this)
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4 6 3 8 21
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numbers are right, but I need to format the table
the output needs to look like this:
int int int int | rowsum
int int int int | rowsum
colsum colsum colsum colsum | total
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public class TwoWayTable extends Applet {
int numRows;
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     int [] [] cell;
     int [] rowSum;
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     int grandTotal;
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ADF BC , lock the rows sometimes and do release it

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