Problem: Backup one VM: API Call failed with message: File is larger than the maximum size supported by datastore '

Hi,

I have 60 VMs which we backup with Vranger Pro ( latest Version ).
Unfortunately we cannot backup our echange server: Vranger stop after 1 minute with the following error:
M Name: w1-ms01
Result: Failed
Start Time: 13.07.2010 10:53:46
End Time: 13.07.2010 10:53:46
Duration: 0 minute(s)
Archive Size: 0 GB
Message: An internal error occurred during execution, please contact Vizioncore support if the error persists. Error Message: API Call failed with message: File <unspecified filename> is larger than the maximum size supported by datastore '<unspecified datastore>
-> There is enough Space on the datastore and the repository !!
Perhaps anyone have an idea ?
Thanks
Hendrik