Passing Parameters (Urgent)

I'm trying to execute this statement but due to some missing paremters its creating table in that fashion

Table created = '+@string+'_'+@string1+'

but I want table to be create as what parameters passed, can you have a look pls...

exec sp_test 'master','table'
Starts here-----------

if exists (select * from sysobjects where id
= object_id(N'[dbo].['+@string+'_'+@string1+'])
and OBJECTPROPERTY(id, N'IsUserTable') = 1)

Drop table [dbo].['+@tblName+'_'+@table1+']

CREATE TABLE [dbo].['+@string+'_'+@string1+']
(
[HESClrId] [nvarchar] (20) NULL ,
[HESClrName] [nvarchar] (60) NULL ,
[HESClrSeq] [smallint] NULL
)
ON [PRIMARY]