SP Datetime Parameter Problems

DROP TABLE TestTable

CREATE TABLE TestTable (
 StID tinyint NOT NULL ,
 StDate datetime NULL ,
 Amt float NOT NULL CONSTRAINT [DF_TestTable_Amt] DEFAULT (0),
 CONSTRAINT [PK_TestTable] PRIMARY KEY  CLUSTERED
 (
  [StID]
 )  ON [PRIMARY]
) ON [PRIMARY]
GO

/*
And After i'll create insert SP useing 'CREATE STORED PROCEDURE WIZARD'
Sp name:'insert_TestTable_1'
And Pass Some Parameter values
*/

Exec insert_TestTable_1 1,getdate(),50.25

--gives Error
Server: Msg 170, Level 15, State 1, Line 1
Line 1: Incorrect syntax near ')'.

waht is that problem need help..