[yinjang]

Have you allowed registration under settings – general?
These folders are missing is normal.

What do you mean with:

it works as an admin , when i checking it from other brower ,probelm is still same

[yinjang]

Why don’t you install it through WordPress?
Dashboard -> Plugins -> Install -> search for Buddypress and then install it.
Then go to Settings -> Buddypress -> Sites and you can change the site fore registration and activation, it can be, that the sites don’t exist, so you need to create them and link them to it.

[yinjang]

THanks, man. That helped a lot. Everything working fine now!