FrameBuffer problem

There may be some problem about the ps2 component when i generate the system_0.ptf.and i use the Quartus II 5.0.below is the error:

# 2007.04.02 09:42:00 (*) Running Generator Program for VGA_0

# 2007.04.02 09:42:03 (*) Running Generator Program for ps2_0

ERROR:

In object '' of class e_port: can't access `vhdl_record_type' field

known fields are:

_AUTOLOAD_ACCEPT_ALL

__is_inout

_creation_history

_direction

_export

_negated

_never_export

_object_list

_parent_set

_project_set

_ptf_written

_signal_list

comment

copied

declare_one_bit_as_std_logic_vector

default_value

depth

indent

isa_dummy

name

paragraph

trimmed

type

vhdl_declare_only_type

vhdl_default

width

known pointers are:

_parent

_project

keys:

_AUTOLOAD_ACCEPT_ALL

_permitted

_pointers

by the way, this object is a dummy

Error: Generator program

for module 'ps2_0' did NOT run successfully.