Crystal Reports Viewer seems to have data - but it is not showing

I am developing on a Windows 7 box and publishing a VS2010 web application to a Windows 2008 server.
On the server I have installed CRforVS_redist_install_64bit_13_0
Reports are stored in a folder on that server.
When I run the application on my local machine the report displays okay via the Crystal Reports Viewer on a .aspx page.
When I run the application on the server, if I view the source of the page that contains the Crystal Report Viewer - it seems to have fetched the report okay. But it is not showing on the screen. I was thinking this might be because it can't find the 'style.css' file but on both the development machine and server all the various folders and files in and under crystalreportviews13 are present in aspnet_client/system_web/4_0_30319/
When I view the source of the pages that display the report - they seem to be identical both when viewed on my development box and when accessing the app directily on the server. But, on the .aspx page displayed by the server, the page is blank in the browser. Yet, as I say, when you view source all the data is there.
What am I doing wrong? Thanks for any help.
Edit: In both cases if you View Source the page is showing this:
<link rel="stylesheet" type="text/css" href="../aspnet_client/system_web/4_0_30319/crystalreportviewers13/js/crviewer/images/style.css" />
On my development box this makes sense. The web site in question is below 'Default Web Site' - i.e. it is at the same level in the folder hierearchy as the aspnet_client folder.
But on the server, the site is a subweb below a web site that is level with Default Web Site. So I figure the files are not being found. How can you tell the Crystal Reports Viewer that the files it wants (like style.css) are not where it thinks they are going to be?
So the app is looking for a file at the same level.
But on the server there
Edited by: Steve Rowson on Jun 1, 2011 5:31 PM

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The problem: Crystal Reports Viewer does not prompt me to input the parameter. In my actual Crystal Report, I had the box "Save Data with Report' left unchecked, as the account number frequently changes. However, if that box is left unchecked, Crystal Reports Viewer will give me the error message "No Saved Data. This report file does not contain saved data and cannot be viewed. To get data into the report, please open and re-save it in the Crystal Reports designer application with the "Save Data with Report" option selected."
Thinking that possibly it was the version of Crystal Reports in which the report was created (XI), I downloaded the free trial of Crystal 2008 and created a very simple test report with one parameter for account number where the account number is retrieved from our database. And I am having the same trouble.
The "Help" section of Crystal Reports Viewer tells me that I can select my parameters in the parameter panel. I do not see anything in my parameter panel other than the words "Current Data Set Last refreshed: 04/12/10 2:58 PM". The help tells me that I can "select the parameter directly in this panel by entering a new value", but there is no option to do so.
Any help would be appreciated.
thanks,
Noel

What I've learned is that I was originally using Crystal Viewer XI and upon opening it I received a message indicating there was an update.
I ran the update which put me on Crystal Viewer 2008.
Since then I have not been able to refresh my screen to bring up the parameters.
See the attached forum for another post concerning this same issue.
Paramter Prompts in Crystal Viewer

Crystal Reports Viewer seems to have data - but it is not showing

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