Xilinx ISE 6.1i+SP2 And Modelsim 5.8

Hi all
    I have a problem with Modelsim simulation.
    When I use Modelsim 5.7f, I creat a project under ISE 6.1i+SP2, set
Simulator value to Modelsim,
it's fine. But yesterday after I upgrade Modelsim to version 5.8, when I
open the project, it said
that "This project was last saved with the project property 'Simulator' set
an unvalid value of 'Modelsim'".
    How can I solve this problem?
    Thanks for any advance

Peng Cong wrote:
> Hi all
>     I have a problem with Modelsim simulation.
>     When I use Modelsim 5.7f, I creat a project under ISE 6.1i+SP2, set
> Simulator value to Modelsim,
> it's fine. But yesterday after I upgrade Modelsim to version 5.8, when I
> open the project, it said
> that "This project was last saved with the project property 'Simulator' set
> an unvalid value of 'Modelsim'".
>     How can I solve this problem?
>     Thanks for any advance
> 
> 
try a

    vcom -refresh

from your source directory.

Consider calling vcom and vsim from the command
line instead of using the gui project manager.

   -- Mike Treseler