Whatsapp iphone pics and videos?

I have whatsapp on my iphone 4. When i click on the video or picture it automatically saves to my camera roll and i can view it. However i have lost my images but they are still present in the conversation on whatsapp. When i click the image it opens but doesn't save, if i hold down on the image it doesn't let me save and there's no button for it. Could somebody find me a solution, thanks in advance.

Ok, so let's try this: Go to whatsapp, go to the chat, go to the image, tap it, and then it should be fullscreen-ish. Now hold on the inage and copy it. Then paste it on safari and hold on it and save it. If that does'nt work, then Open the image, take a screenshot of it (home button at the same time as lock button. Download a cropping app. Crop, Crop it, I don't know just search for one. Then go to the cropper, select crop a picture from camera roll and choose the whatsapp image screenshot. Crop it so that you can only see the image, then save. Even though the quality of the picture will not be fully perfect, it still is perfect.