Fresh Install. Cant login

[santanu]

Fresh install of smf 2.0 beta 4.

no mods.

cant login. error " Unable to load the 'main' template."

even the theme X-mas not working from then

uploaded the default login templete but not working.

[H]

Try re-uploading the files, it sounds like one of them was not uploaded correctly.

I recommend using FileZilla

[santanu]

I am using FileZilla.

everything working fine. even installed it.

But once i got logged out. I cant login again.

[H]

Did you try clearing your cookies? You might also want to check your paths with repair_settings.php. See: What is repair_settings.php?