CPYTOIMPF STMFCODPAG(*PCASCII)

On v5r1 I used to be able to copy a *SPLF to a *PF and then use CPYTOIMPF 
with STMFCODPAG(*PCASCII) to get an ascii file in the IFS.

With v5r3 this no longer seems to work. When I display the file in the 
IFS, even tough it looks largely ok, I get the message 'File CCSID 
incorrect' (CPDB610) at the bottom of the screen:

Cause . . . . . :   The file CCSID was 01252, but the data in the file
   looks like EBCDIC. A CCSID of 00500 is being used. 

Recovery  . . . :   If another CCSID is needed, use F15 to change to the
   desired CCSID. 


When I ftp (bin or asc) off the file to a PC it looks like a mess (or as 
the above message suggests, like EBCDIC data).

What am I doing wrong?
Moe