Problem saving report in enterprise server

I have created a report with dynamic parameter (read from a db field) and facing problem when i save the report into the enteprise server. When saving through crystal report server 2008 designer tool, I get the error message "Failed to read data from report ...Reason:Failed to read parameter object"

Through infoview I get the error message " An unexpected error has occurred"

If I make parameter as static (no drop down box at runtime) it works fine.