issue with cascading prompts in Crystal Reports 2008

Hi,

I have created a cascading prompt Like (County->Region->City) using the Crystal Reports 2008, when i try to save it to the BO enterprise server i am not able to save it.infact i am getting an error message as 'failed to read the parameter object'.

So am i missing any settings to be configured in order tio resolev this error.

Please let me know how to resolve this issue so that i should be able to save the report to BO enterprise server without any issues with casacading prompts.

Best Regards,

Nanda Kishore.