MDT 2012 - Error while importing driver CABs

Hello community,

I have a huge problem with MDT2012 since yesterday: I cleaned my driver repository a little and now I cannot import driver CAB´s anymore, every time it ends with this error:

System.Management.Automation.CmdletInvocationException: Index was out of range. Must be non-negative and less than the size of the collection.
Parameter name: index ---> System.ArgumentOutOfRangeException: Index was out of range. Must be non-negative and less than the size of the collection.
Parameter name: index
   at System.ThrowHelper.ThrowArgumentOutOfRangeException()
   at System.Collections.Generic.List`1.get_Item(Int32 index)
   at Microsoft.BDD.PSSnapIn.Verifier.AddDriver(String theInfFile)
   at Microsoft.BDD.PSSnapIn.ImportDriver.ImportDrivers(String thePath)
   at Microsoft.BDD.PSSnapIn.ImportDriver.ImportDrivers(String thePath)
   at Microsoft.BDD.PSSnapIn.ImportDriver.ImportDrivers(String thePath)
   at Microsoft.BDD.PSSnapIn.ImportDriver.ImportDrivers(String thePath)
   at Microsoft.BDD.PSSnapIn.ImportDriver.ImportDrivers(String thePath)
   at Microsoft.BDD.PSSnapIn.ImportDriver.ImportDrivers(String thePath)
   at Microsoft.BDD.PSSnapIn.ImportDriver.ImportDrivers(String thePath)
   at Microsoft.BDD.PSSnapIn.ImportDriver.ImportDrivers(String thePath)
   at Microsoft.BDD.PSSnapIn.ImportDriver.ImportDrivers(String thePath)
   at Microsoft.BDD.PSSnapIn.ImportDriver.ProcessRecord()
   at System.Management.Automation.CommandProcessor.ProcessRecord()
   --- End of inner exception stack trace ---
   at System.Management.Automation.Internal.PipelineProcessor.SynchronousExecuteEnumerate(Object input, Hashtable errorResults, Boolean enumerate)
   at System.Management.Automation.Runspaces.LocalPipeline.InvokeHelper()
   at System.Management.Automation.Runspaces.LocalPipeline.InvokeThreadProc()

Funny: For testing I have created a second (new) "deployment share" and the same CABs gets imported without problems there. So the problem must be somewhere in my old share, but I have no clue how to fix this.

I crawled tho hole web and can not find anything! I don´t wont to move my whole share to the new one :(

Any advise?