Having 'issues' using remote shutter control

Hi All,

Am having a problem with using DSLR Shutter on my Canon Rebel XT,

I have used the program + leads before some time ago with no problem,

As soon as I plug the cable into the Bulb port it starts shooting straight away as fast as the Manual setting is at on the camera,

The camera is working perfectly, I have tried it with the manual bulb cable switch and is working no problem,

I have tried plugging it in first before plugging it into the usb and before turning on the camera but as soon as the camera is turned on it starts shooting,

Any ideas where am going wrong?

Graham.

Problem solved!

Typical! It was the only item that was purchased new!

The USB Serial Adaptor! I changed it to another one I had and it worked!

I wouldnt have taught that something so 'manufactured' could have been at fault!