dirx 9c

i downloaded and installed dirx 9c on my internet computer but when i copied the files over to my gaming computer, it wouldn't install. i copied the files over a couple of times then i copied the archive file (directx_9c_redist.exe) over and extracted them there and it still wouldn't install. then i connected to the net and tried to download and install using "dxwebsetup.exe". i keep getting the message, "A cabinet file necessary for installation cannot be trusted.". does anyone know what the problem could be? i've never seen that message installing dirx before. thx, maxwell

machine it won't install on:

asus a7v8x mobo
athlon xp 2000+
nvidea ti 4200 8x vid card w/128 mgs ram
win 98 se