I assume that your model is actually a Sony DSRPD150, a professional grade camcorder (nice device!). Your camcorder records in both DV format and DVCAM format which are different. DV is a standard format while DVCAM is Sony specific format which is described as follows:

DVCAM improves quality over DV by increasing the tape speed from 18.8mm/sec to 28.2mm/sec. It also increases track width from 10 to 15 microns for added reliability. DVCAM uses the same metal evaporated tape as does DV, and DVCAM cassettes can be played in DVCAM, DVCPRO and DVCPRO50 tape decks.

I'm guessing that you are recording DVCAM format on a DV tape and that's why your friend can't read it. Try finding the setting in your user's manual to switch to DV format when you want to send something to your friend!

You should also read this link as there was a recall for certain camcorders of your type:

http://bssc.sel.sony.com/BroadcastandBusiness/markets/10018/prodNotice.shtml

Your camcorder will specifically say if it can play DVCAM or not. More than likely, it probably can't.

What do you mean by professional Sony deck?

Glad to help you out. Tell your friends!