TOS-TNG-DS9 never showed or referenced Archer's Enterprise, and he was Earth's first deep space captain. Even the Enterprise-D computer and the guys from Temporal Investigations (DS9 Trials and Tribblations) only refer to their being 5 Enterprises previously (1701, A, B, C, D).
How could you possibly expect those other shows to make reference to Archer or ST:Enterprise, if that show had not been written yet?
(Besides, there's a USS Archer in Nemesis.
