Th error is - "Unable to authenticate"

Your username/password may be incorrect or there are no servers to validate your login"

I am using Windows 7

I have made sure the login details are correct to minecraft.net login details.

I have also tried debugging and post results if this helps to solve this error.

Would this error come up if my minecraft.net account username is the same as World of Minecraft username?

I have the latest 2.0.5 WOMClient and i am out of idea's please help.