You didn't mention if you were on Mac or PC, but I suspect Mac as it is tougher to find ow to turn this off. FIrst off, it is a Mac os issue, not a C1 issue. After the card is inserted in the reader, open up your Image Capture app. Once open select it's prefs -- in older OSX versions it's in the normal place for app prefs, but in the latest builds it is part of a dropdown in the left pane -- either way, where you choose the action to perform on card insert, set it to "do nothing."