magento installed but cant login

[AhmadBalavi]

magento installed successfully but when i want login to admin panel it cant login and dont show any message. what is problem?

[ashodhiyavipin]

I have the same problem. I have got it installed on my localhost with sample data. I can't login to admin as each time I input my admin name and password the page just reloads instaed of loading my admin area. 

Any suggestion as to how to solve this?

@lenovo1102 can you please say that again in english?

[MagenX]

you need to check if session is correct, cookie domain etc

[Liip ch]

Please check if the /var/session folder is writable by the webserver. Chmod the folder if nescessary.