modelsim10.1c cycloneiv altgx simulation the output is always be K28.5 HELP!!

thx for answering

yes whatever input is the output is the same k28.5+ after k28.5-

I havn't change version yet !

I do some other test ,

I try to change the ALTGX mode to strarixiv of no use

I try to change the clk frequency of no use

I try to use the modelsim "create wave" to generate the clk signal instead of the vhdl then the simulation can't work with

"Fatal error in Process line__168 at K:/altera/15.0/quartus/eda/sim_lib/stratixiv_hssi_atoms.vhd line 172 "

but what matters me most is when I download my design to the cyloneiv , it works , I can't believe it , that's good but that's not what I want!

maybe I should change my modelsim version

sinx