[TenTec] Orion 1 - CW Memory

[John Chance-Read]

I'm new to my Orion 1 and have just tried memorizing a CW call into SEND 1.  The memory indicates the number of characters memorized, which I then RECORD.  I then STOP, but when I press PLAY to check it nothing happens .  I then Exit and as if normally operating I press SEND 1 - nothing happens.  I am using a straight keyer - is this the problem ?.
Help appreciated
John G4BOU