How do i solve this ';user session has expired'; when running crystal reports on the web and asp?

Iam using crystal reports 8.0 and asp to view reports on our company intranet.Some computer display this error while some computer will show the report correctly.How do i solve this ';user session has expired'; when running crystal reports on the web and asp?
When attempting to view a Crystal Report through a web browser, one of the following errors is received:





“User Session Has Expired”





OR





“The oPageEngine object was not created or is not in scope. Please check that the Viewer is referencing rptserver.asp in the correct virtual directory. It is also possible that the ReadRecords method failed. Ensure that you are logging on to the datasource correctly and have provided values for Parameter Fields.”











More Information:





The Active Server Pages require the use of temporary “session” cookies in order to maintain the user state while viewing the Crystal Report. These errors may result if the browser or other software is set to block cookies.











Solution:





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