are you sure you made the portal 5 blocks high and 4 wide? (3x2 Portal frame) that "bug" looks like what happens when you try to light a Nether portal with the wrong portal frame
Can I suggest you to please have a look at this Article, and watch it's video?
Also, are you using 1.5.2 version or 1.5.1? And WHEN have you downloaded the mod?
I seriously need those informations if I ever get to help you. Thanks, and I'm waiting for your answer
I see, I wish you good luck then and a better experience next time. Remember, always have fun :D
Not sure if you are still going to check this but anyways...
Did you make sure to place your water bucket on the bottom of the portal?
I'm not sure why but lots of people have the tendancy to place water blocks on the top.(of the 2x3 hole) That will not work and it'll just cause the water to flood.
thx chuankai it worked but when i played aether 1 you had to place at top well anyways thx
and they should make it like the old aether portal