Decode the message

Use the following key to decode the message.

= A
= B
= C
= D
= E
= F
= G
= H
= I
= J
= K
= L
= M
= N
= O
= P
= Q
= R
= S
= T
= U
= V
= W
= X
= Y
= Z

What does the message say?