logon and world help??

[firewall]

Hello i am on a VPS server and am running my website and server still need to configure abit i guess, but you see, here is my problem, i run mysql for my wow server and its fine, but once i get to logon and world, i open them, and within 1 secound or less they close with a blank doss screen nothing on there,

why???
if you can help me i would be very greatful

thank you.