Workbench crashing on OS import

background information: i've moved build server (2008 r2) virtual proxmox vmware san. the move went fine , works. i made copy of server different name test upgrading fro 2010 2012. the upgrade finished without errors , can deploy win7 sp1 machine no problem. monitoring , dart work ok. the problem can't import other os's ds. i've tried win7, win8 , winxp each time workbench crashes error: mmc has detected error in snap-in , unload it.: description: stopped working problem signature: problem event name: clr20r3 problem signature 01: mmc.exe problem signature 02: 6.1.7600.16385 problem signature 03: 4a5bc808 problem signature 04: microsoft.managementconsole problem signature 05: 3.0.0.0 problem signature 06: 4a5bda5a problem signature 07: 33d problem signature 08: b problem signature 09: n3ctrye2kn3c34sgl4zqyrbfte4m13nb os version: 6.1.7600.2.0.0.272.7 locale id: 2057 read our privacy statement online: ...