There is obviously something very wrong in how you have reassembled the parts.
The fitment should be trouble free. Have you checked that you have fitted the EGR cheater correctly to the wiring loom?
Have you got all the manifold seals fitted correctly?
Have you got the T/B seal fitted correctly?
Other than this there are only vacuum pipes to worry about. You need to go back over everything that you've done. Vocky or Daz can help you out via PM if you need to contact them.
Sorry I can't be any more help but I think its back to the start?