ModelSim Gate Level Simulation Error!

Hi...

Please help me,..

I got an error messages when I try to perform ModelSim Gate Level Simulation from Quartus II, here are the error messages :

#  ** Error: (vsim-SDF-3250) Transmitter_8_1200mv_85c_vhd_slow.sdo(661): Failed to find INSTANCE '\COMP_Counter|Equal0~0\'.#  ** Error: (vsim-SDF-3250) Transmitter_8_1200mv_85c_vhd_slow.sdo(673): Failed to find INSTANCE '\COMP_Counter|Equal0~1\'.#  ** Error: (vsim-SDF-3250) Transmitter_8_1200mv_85c_vhd_slow.sdo(569): Failed to find INSTANCE '\COMP_Counter|Equal0~2\'.#  ** Error: (vsim-SDF-3250) Transmitter_8_1200mv_85c_vhd_slow.sdo(245): Failed to find INSTANCE '\COMP_Counter|Equal1~0\'.#  ** Error: (vsim-SDF-3250) Transmitter_8_1200mv_85c_vhd_slow.sdo(645): Failed to find INSTANCE '\COMP_Counter|count\'.#  ** Error: (vsim-SDF-3250) Transmitter_8_1200mv_85c_vhd_slow.sdo(632): Failed to find INSTANCE '\COMP_Counter|count~12\'.#  ** Error: (vsim-SDF-3250) Transmitter_8_1200mv_85c_vhd_slow.sdo(614): Failed to find INSTANCE '\COMP_Counter|count\'.#  ** Error: (vsim-SDF-3250) Transmitter_8_1200mv_85c_vhd_slow.sdo(461): Failed to find INSTANCE '\COMP_Counter|count~4\'.#  ** Error: (vsim-SDF-3250) Transmitter_8_1200mv_85c_vhd_slow.sdo(490): Failed to find INSTANCE '\COMP_Counter|count\'.#  ** Error: (vsim-SDF-3250) Transmitter_8_1200mv_85c_vhd_slow.sdo(476): Failed to find INSTANCE '\COMP_Counter|count~6\'.#  ** Error: (vsim-SDF-3250) Transmitter_8_1200mv_85c_vhd_slow.sdo(522): Failed to find INSTANCE '\COMP_Counter|count\'.#  ** Error: (vsim-SDF-3250) Transmitter_8_1200mv_85c_vhd_slow.sdo(508): Failed to find INSTANCE '\COMP_Counter|count~8\'.#  ** Error: (vsim-SDF-3250) Transmitter_8_1200mv_85c_vhd_slow.sdo(551): Failed to find INSTANCE '\COMP_Counter|count\'.

What is that means? How to fix those problems...?

And also, when I tried to run Gate Level Simulation, Dialog Box opened and it consist of 3 Timing Model options, "Slow -8 1.2V 85 Model", "Slow -8 1.2V 0 Model", "Fast -M 1.2V 0 Model". What is the meaning for each model?

Thanks in advance, any kind of help will be appreciated...