Business view - parameter value mismatch with its default values

[Eveline75]

In Busniess View, when I upload a new stored procedure in the Data Foundation, with 5 parameters as
@year
@Period
@WeekBegin
@WeekEnd
@DateFunction

After I enter the values in the parameters, after some time, I get an error message as “Parameter value mismatch with its Default values and/or Current values”

Please help. I need it badly.
I use Business Objects Enterprise XI, Crystal Reports Server R2, SQL Server 2000 for DB

Thanks-in-Advance,
Eve