Memory full ... when there are no pictures

Get freeware recovery software on web..DON'T use card any further to avoid putting new images on spots where old ones were deleted.

Then you can recover deleted items.

Files gone? What might suit you is 4Card Recovery. It can recover movies, music, pictures and other files very quickly.
How to Recover Photos Videos off SD Card after Formatting Unformat SD...

That means the memory card was corrupted. You need a memory card recovery to recover photos before seeing it. I recommend you use Card Data Recovery, i can recover data from corrupted or damaged memory card.

in you video camera setting check where the files are getting stored
in gonna wanna be set to external storage or memory card

SD cards have a slide switch along one edge. The position farthest from the contacts locks the card, protecting it from writes. The position nearest the contacts unlocks the card.

4GB "SD" cards are almost always actually SDHC (high capacity) cards. SD and SDHC cards fit the same slots, but they are slightly different electrically. Many cameras won't work with SDHC cards. SDHC is not backwards compatible.

So your camera is not able to use the 4GB card, and is ignoring it and using internal memory only. That memory is tiny and won't hold many pictures, and when it is full, the camera cannot work at all. You need to delete the pics in the internal memory and get a memory card your camera can understand (2GB or less).

either your pc card reader or adapter for sd card is at fault here....but try this way connect your camera to pc (using usb cable)...go to my computer see the new device (camera) click on it to open ...your pix are there now copy & paste (click & drag) to your folder on the pc...hope this is helpful...feel free to rate

It will not work with any "sdhc"

Took it to Jessops by the process of elimination "Integral reader faulty."
What a waste of many hours !

try formatting it in the computer, then initializing it in the camera.
It's possible that the camera can only handle memory up to 1Gb. Try a 1g CF card.