Susan L,
We are sorry to hear that you are having trouble opening the S-Biner MicroLock. In case you are not turning the dial at the center of the S-Biner to left, please do so. That will unlock the S-Biner's gates. If you have further questions, please contact customer service at info@niteize.com or at 800.678.6483 8-5 M-F MST.