CR with JSF, InvalidClassException

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I am using the JSF report page viewer component <v:reportPageViewer>.

It works fine when displaying the report page for the first time. But I fails when any action performed on the report such as clicking 'Next' with InvalidClassException JPEReportSource:No Valid Constructor(error message below).

I have the javax.faces.STATE_SAVING_METHOD as 'server' .

Please help me resolve this bug.

Thanks,

Kale.

The stack trace of the exception is

SEVERE: Exiting deserializeView - Could not deserialize state: com.crystaldecisions.reports.reportengineinterface.JPEReportSource; no valid constructor

java.io.InvalidClassException: com.crystaldecisions.reports.reportengineinterface.JPEReportSource; no valid constructor

at java.io.ObjectStreamClass.<init>(ObjectStreamClass.java:379)