Canon EOS 60D will not fire when using RC-6 Remote switch, I used the camera shutter timer as instructed as instructed by the instructions that came with the remote switch, when I fire the remote switch the camera fires but only after counting down the timer. It worked normally for about two months then while I was shooting it went to counting down. I tried removing the battery to see if it would reset that did not work.

SOURCE: low battery warning

What type of batteries did you buy?

For digital cameras, you want to use batteries with high milliamp hour (mah) rating: "2500 mah" if they are rechargeable.

If you bought regular batteries, you want to use good quality. Look for the "e2" or "better for digital equipment" type.

Does the camera have a DC power plug option? Try taking pictures with it plugged in if it does. If it still malfunctions with power right from the wall, then you bought a bad camera.

SOURCE: Rebel 2000 went retarded

I got a Rebel 2000 off ebay, and it had the same problem. The Shutter wouldn't open, it showed dead batteries, and the mirror hung until I pressed the shutter button or changed modes.
After a good deal of surfing, I found that the most likely reason was a sticky/oily shutter
(http://photonotes.org/articles/oily-shutter/).
Since I didn't have much $$$ invested in the camera, I tried cleaning the shutter curtain with Qtips and alcohol. After a little cleaning, the shutter started to move. After a lot of cleaning, the shutter moves freely. I ran a roll of film through it, and it seems to be working just fine now.

SOURCE: Canon 40D not firing

Try doing a reset in the camera tools somewhere, this fixed a similar problem I had.

SOURCE: remote shooting on Canon PowerShot A550

The software that comes with the A630 is generic to the whole series of cameras with different capabilities. Some have this feature, and some, like the A500 - A600 series, do not. Do not feel bad though. Many of the cameras that do have this capacity cannot do the photo-stitch picture merging that your camera does.

SOURCE: with a canon 1000d, shutter button wont work, have

try to disable the mirror lockup at C.fn no. 8