Question about image storage and the sdk

I have 2 Windows images:

Image A - was created couple of months ago

Image B - was created today

Steps I used to create Image B described here: http://blogs.technet.com/b/keithmayer/archive/2013/01/17/step-by-step-templating-vms-in-the-cloud-with-windows-azure-and-powershell-31-days-of-servers-in-the-cloud-part-17-of-31.aspx

I use these images to create new VMs using Ruby SDK libraries. All is working as expected with Image A from both Portal and SDK. In case with Image B it is only works from Portal, but not SDK. SDK is throws "The virtual machine image source is not valid." message.

Further debugging of SDK call showed that Image B is not present in the list, but it is present in the list on Portal...

The only difference I noticed between Image A and Image B is that on IMAGES tab Image A has Source set to "-" and Image B is pointing to Cloud Service where VM used for image customization was hosted. And deletion of Cloud Service B did not change Source information for Image B to "-".

Can some one tell why new image is available from Portal, but not from SDK listing?