We would like to know if both of the SSDs you have are Samsung* branded?
About the situation, we can suggest you to check under windows management and make sure the SSD is initialized, here is a link for you to follow: How to: Initialize And Format A New Disk For Use In Windows
Hope this help you a lot.
Yes both SSD's are Samsung brand. Your recommendation for initializing the disk with windows management worked great. Can see both drives now.