error when trying to add file server role to w2k3

tyring to implement  a file share in our virtual infrastructure.  when I try to add the role i'm being prompted for a file:  microsoft.storage.sanmmc.dll

i insert my 2k3 disc and mount drive to my VM, but still can't find the file.

i tried installing this hotfix with no positive results:  KB Article Number(s): 946824

any assistance is greatly appreciated!  thanks