I've recently decided to go back to 1.2.5 to try an old RPG mod called EternalCraft. I know there are several modern RPG mods,but I want to try this one since it has several things that most modern RPG mods are missing (a stat system, boss music, complex and challenging boss fights, etc).
I've already installed old forge and deleted META-INF. Forge is working fine, but the problem comes when installing modloader (which is required for the mod). I've already looked at several tutorials and done exactly what they all say, but when I click the play button on the launcher, it disappears (as usual), but the game window never shows up. I tried opening it again, and it said it was running. The only way I could get it to "close" was by ending Java in task manager. I went back to my pre-modloader backup and it worked again. Installing modloader without forge makes the same thing happen.
I've heard some people say that by this point forge was already starting to come bundled with modloader, but I don't think it's the case since installing the mod alone shows the mojang logo for a second and then the screen goes white.
If anyone who reads this has downloaded modloader for 1.2.5, please tell what I might be doing wrong. Thanks.