relative path in a do file

hello

i am a beginner in modelsim

i want to use relative path in do file but it doesn't work

my os is windows xp

my relative path is :

vcom -work Work_Project ../../SRC/A_Interface.vhd

error:

Failed to open design unit file "../../SRC/A_Interface.vhd" in read mode.

how can i do this?

thanks alot.