Database Restore Problem --- One or more users using this particular database

DECLARE @DatabaseName nvarchar(50)
DECLARE @SPId int
DECLARE @SQL nvarchar(100)

--SET @DatabaseName = N'AdventureWorks2008'
SET @DatabaseName = 'AWALTesting'
DECLARE my_cursor CURSOR FAST_FORWARD FOR
SELECT SPId FROM MASTER..SysProcesses
WHERE DBId = DB_ID(@DatabaseName) AND SPId <> @@SPId

OPEN my_cursor

FETCH NEXT FROM my_cursor INTO @SPId

WHILE @@FETCH_STATUS = 0
BEGIN
SET @SQL = 'KILL ' + CAST(@SPId as nvarchar(10))
print @SQL
EXEC sp_executeSQL @SQL
--KILL @SPId -- Causing Incorrect syntax near '@spid'.

FETCH NEXT FROM my_cursor INTO @SPId
END

CLOSE my_cursor
DEALLOCATE my_cursor