Yup, true. I didn't read OP's post carefully. So yes, try some of the other suggestions in this thread.

Actually, Pugsy is right. I just threw caution into the wind and inserted my SD card unlocked. Not only didn't Windows (on Vista, believe it or not) write anything to the card (even hidden/system files), but when I reinserted the card into my Respironics Dreamstation, there was no apparent problem. ...

Russ, keep trying periodically to log in with the name and password you gave when you registered. Mine was recently "approved" after waiting a couple of weeks but I got no notification of it - just happened to try to log in yesterday and lo and behold it worked! Same for me. Hopefully it'll work yo...

As those who use Sleepyhead know, you sneakernet the SD card from your Machine to your computer. Sleepyhead is very good about warning you to lock (write protect) your SD card before putting it into your computer's SD card reader, lest your data be inadvertently overwritten. You do that by sliding t...

OP, if all else fails you could try uninstalling then reinstalling Sleepyhead.

Hey, it's working! Thanks!