a problem in sql server

Hello guys. I have a problem in sql server .
I create a table and I create a stored proc in another stored proc.
When i execute USP_CRE_USP_INS the sqlserver give me an error.
please help me

CREATE DATABASE TESTDB
GO
CREATE TABLE TEST
(
   ID INT IDENTITY PRIMARY KEY,
   FNAME VARCHAR(50),
   LNAME VARCHAR (50)
)
GO
CREATE PROC USP_CRE_USP_INS
AS
BEGIN
     DECLARE @RESULT VARCHAR(500)
     SET @RESULT=
        'CREATE PROC USP_INS_TEST
         @FNAME VARCHAR(50),
         @LNAME VARCHAR(50)
         AS
         BEGIN
         INSERT TEST(FNAME,LNAME)
         VALUES (@FNAME,@LNAME)
         END  '
     EXEC @RESULT '123','123'
END

And sql server error is:

Msg 203, Level 16, State 2, Procedure USP_CRE_USP_INS, Line 14
The name 'CREATE PROC USP_INS_TEST
         @FNAME VARCHAR(50),
         @LNAME VARCHAR(50)
         AS
         BEGIN
         INSERT TEST(FNAME,LNAME)
         VALUES (@FNAME,@LNAME)
         END  ' is not a valid identifier.

Tags: SQL Server