How to get value from query

hi,

I wrote a Stored Procedure which is long with multiple IF conditions,so in report i need to get value from Column ,i followed the following steps

Report Data-->Parameters-->Right Click-->Add new Parameter-->Name:AccountType-->  Available Values-->Get Value from  a Query -->Dataset:Dataset1,Value field:AccountType(column from Database),Label field:AccountType(column from Database)

-->Default Values-->Get values from Query-->Dataset:Dataset1,Value field:AccountType-->OK

But I am Getting the below ERROR

"The report parameter ‘AccountType’ has a DefaultValue or a ValidValue that depends on the report parameter “AccountType”. Forward dependencies are not valid"

THANKU