[Closed] HTC Desire and lost SD card data...

A few days ago my Desire flashed up a warning that in future I should unmount my SD card correctly to avoid losing date. I hadn't touched it or even connected the phone to the PC.

Two days later and I wake up to find my phone has gone flat overnight and turned off, when I turned it back on it warned me that my SD card is blank and displays a permanent SD card symbol with question mark at the top of the screen.

Apart from my photos/music/video clips etc, what else should be on the card? I've noticed voice navigation doesn't work any more, the turn-by-turn just chimes at me to tell me a junction is coming up, also I've lost all my bookmark screenshots. I'm guessing there is a load of software on there such as HTC Sync?

I removed the card and used an adaptor card to connect to my PC, it won't recognise that I've connected the card. A normal 1gig card works, but could the adaptor be incompatible with the 4gig 'HC' (high content?) card? Both card and adaptor are Sandisk, just the size of card that differs.

I was hoping to use one of the free data recovery programs to see if I can recover my stuff. If I can't connect it to my PC, will I be able to use recovery software via USB cable to the phone? Phone just keeps prompting me to format the card.

Only other possibility is I have 'wavesecure' installed, but once I realised you had to pay for it I left it alone. Only the backup facility is available on the demo mode, will it have done this automatically meaning I could pay for the app and be able to restore the data, or do you have to instigate the backup manually?

Thanks