Visual Studio :: NHibernate Expecute Stored Procedure?

<?xml version="1.0" encoding="utf-8" ?>
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2" assembly="Domain" namespace="Domain">[code]....

System.Collections.IList result = query.List();

i get the following error "could not execute query" but when the stored proceuser has been execuated when i view from the sql profiler the following sql code has been run in the profile

exec sp_executesql N'exec dbo.Usp_GenPersonGetRowByFamilyName @p0,@p1,@p2,@p3,@p4,@p5,@p6',N'@p0 nvarchar(6),@p1 nvarchar(4),@p2 nvarchar(3),@p3 nvarchar(6),@p4 bit,@p5 bit,@p
bit',@p0=N'najath',@p1=N'Name',@p2=N'Des',@p3=N'najath',@p4=1,@p5=1,@p6=1