Problem with newly downloaded game file

Hi played this game back in it's early day. and have come back to it a time or two over the years. I would like to come back to it once again. Yesterday I downloaded the game client and installed it but i get an error

when i click ok it seems to attempt to run the game log in but it is just a white box.. however the white box will flash momentarily to the green realm startup when i move the mouse over the uppermost part of the box.. other than that nothing more happens and nothing ever loads

ok just found the part of the site that says run in win xp service pack 3 compatibility mode
up and running now

That helped, thank you

Solved my problem too, cheers.