Distributed Transaction /Linkservers

Hi,
we have 2 Servers Server1(sql2000) and Server2(sqlserver 2005)
select * from Server1.DB1.dbo.Table1
select * from Server2.DB2.dbo.Table2
The above queries on Server1 are working fine.


--stored proc created on Server1
create  proc sproc
as
declare @col1 int
declare @var1 int, @var2 int

begin distributed tran

insert into DB1.dbo.Table1(col2)values('test')
set @col1 = @@identity

insert into Server2.DB2.dbo.Table2(col1, col2)
values(@col1, 'test')
set @var2 = @@error

if(@var1 = 0 and @var2 = 0)
     commit tran
else
     rollback tran

please help me