Parameters Panel empty in Crystal Reports web viewer (infoView)

Hello experts,
here is my situation:
While viewing my reports, any of them, even the examples that come with installation, and I click on the button to show the Parameters Panel it just shows a blank (gray) panel....
so then I'm unable to change any parameter like a range of dates for example, and my report shows only the information related to the parameters I choose when I was in Crystal Reports 2008 and published it.
How could I solve this issue enabling again that panel?
Thanks in advance,
Carlos Henrique Matos da Silva - SAP BusinessObjects BI - Brazil.

Hello Tracy,
thanks for the reply.
yes, I already have some parameters set up there as you said and I can view them while developing in Crystal Reports 2008 and I can change whenever I want......
the issue is just when viewing in infoView, or also in the HTML preview in CR2008. In this case it shows me a panel without anything in it (gray), it's like something is missing to load it properly.
Please advise.
Thanks in Advance,
Carlos Henrique Matos da Silva - SAP BusinessObjects BI - Brazil.

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