ModelSim XE: Can't import vital 2000 library

Hi,

I have a problem with ModelSim XE II 5.6a. I can't execute any simulations beyond behavioral, because ModelSim doesn't find the vital 2000 library, though it is physically present. Here is the significant part of the error messages:

-----SNIP-----

# ** Error: (vcom-19) Failed to access library 'vital2000' at "vital2000". # No such file or directory. # ** Error: (vcom-19) Failed to access library 'vital2000' at "vital2000". # No such file or directory. # ERROR: C:/Modeltech_xe_starter/win32xoem/../xilinx/vhdl/simprim/vcomponents/_primary.dat(12): Library vital2000 not found. # ERROR: C:/Modeltech_xe_starter/win32xoem/../xilinx/vhdl/simprim/vcomponents/_primary.dat(13): Unknown identifier: vital2000

-----SNAP-----

I can't import the library, because the File->Import->Library command ends with "KernelUnknownError" after selecting the library. Any ideas what to do?

Thanks in advance for all hints, Jörg