Solve the code

[torkell]

On the Jazz2Online forum there used to be a thread wherein people would post encrypted messages and challenge other people to decrypt them. I came up with this one, and so far only the first layer of enciphering has been decoded.

EEREE ETRET ERETE ERETE ERRTT REEEE RTETT RTETT REEER RETTE 
RTETR EERTT ERTET TRREE EREEE TRTET REETE RTETT RRTET TRETT 
EREEE TRETT TRETT RREET ERTET REEET REETE RTEET RRTET REEEE 
RTETT RETTT REERR TTETR ETTTR EEETR ETTTR ETTRR TTETR EEEER 
TERET TRETE RREET ERTTR TETRT TEERE EETRR TTETR EEERT TTRET 
TERTE EERRR

The plaintext is a short phrase, with all spaces and punctuation removed. The plaintext may not be the same length as the ciphertext. Further hints are available if you get stuck.