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Run a "/Get-ImageInfo" DISM command on your image to see what index you should use.
From an administrator command prompt, type in the following: 
DISM /Get-ImageInfo /ImageFile:"c:program filessirckssmartimagerrepositoriesimagesMyImage.wim"
Adjust "/ImageFile:" path as necessary to point to your image
Run a "/Get-ImageInfo" DISM command on your image to see what index you should use.
From an administrator command prompt, type in the following: 
DISM /Get-ImageInfo /ImageFile:"c:program filessirckssmartimagerrepositoriesimagesMyImage.wim"
Adjust "/ImageFile:" path as necessary to point to your image