all reports saving user prompt values - please help

[dfite]

(Hi guys.  We're running report studio 1.1 with no patches.)  In 2 of our 4 environments, the reports seem to be caching user-entered values from the promt pages and re-using them for every subsequent report execution, even though I have the "Prompt for Values" check box checked on all reports.  I can clear the values, and the report will work properly once, but will again retain and reuse the values every time after that.  As I mentioned, this only happens in 2 of our environments, but not in the others, yet I can't find a Cognos Configuration setting that would goern this behavior.  I think the issue dates back to when the environments were set up, but I am not sure.  Does anyone know what config or .ini file setting to look at to fix this??

Thanks!