Help tempdb GONE - sql 2005

I was attempting to move the tempdb to a different drive using sql 2005.

Here are the steps i took:
Added: -T3608 to the startup parameters
stopped and started sql service

detached the tempdb

attempted to reattach and i got the error 'tempdb already exist'

So, i tired to detach again and it said 'tempdb' does not exist

I have tried using the alters:
use master
go
Alter database tempdb modify file (name = tempdev, filename = 'E:\Sqldata\tempdb.mdf')
go
Alter database tempdb modify file (name = templog, filename = 'E:\Sqldata\templog.ldf')
go

and i got the correct message - but again when i stopped and started sql service - tempdb was still not there.

Please help