Lately, I have been having trouble Logging on to Victory Battles. I type in my username, then my correct password, and it won't log me in.

This actually happens to me too sometimes. I can usually remedy the situation by clicking the Adoptable in my signature here and I will be logged into VictoryBattles when it takes me to my Pokemon's profile, but it is still somewhat of a hassle.

Is any specific message given to you? These usually are:

Mis-typed Password: "You appeared to have entered a wrong password. Remeber, passwords are case sensitive."
Mis-typed Username: "No user exists with that user title. Is it possible that you have changed your name recently?"

Additionally, what browser are you using?

I had this problem with Firefox, and what happened was I would click "Let's Go!", it would load for a little bit, and then the page would refresh and still be at the log-in page with my username and password typed in. There was no message on either of the two being incorrect.

Another question, what site are you trying to go to?
http://battles.victoryroad.net does not allow log-ins for some reason, however
http://victorybattles.net does allow for log-ins.

Oh yeah, I forgot about that. I had noticed at one point that it wasn't redirecting properly so I just decided to mirror it. I noticed this was a problem but the main reason for the mirror was so the images would work. Regardless, its fixed now (you will be redirected to victorybattles.net).

I wasn't using the former one. I am using the more recent one and no, I am not getting error messages, in fact, when I log in, all it does is refresh the page and the boxes where you type in the username and password are blank, and I am using Internet Explorer 8.

I have made limited tests in IE8, all of which run fine. I believe you got it running in some scenario anyway, but do post if there's anything else.