This may sound like a random request...but then again, it may not...but anyway...

I got an old secondhand cordless phone for Christmas (a Uniden XCA 650 Speakerphone).  All is working fine - however, I haven't a clue on how to record my own personal answering message on it!  I've pushed buttons left and right, and still to this day I get some annoying American guy answering my phone saying, "Hello. No-one is available to take your call..."

Pleeeeeeease...How do I change it???

Thanks in advance!