LINQ to SQL包含存储过程和用户定义的表类型参数

I am using LINQ to SQL with stored procedures in SQL Server 2008. Everything work well except one problem. L2S cannot generate the method for the stored procedure with user defined table type as parameter. Method signature in dbml design panel use object for parameter type instead of table type and when I tried to compile I got error:I am using LINQ to SQL with stored procedures i