CHeck mod_rewrite. Try http://docs.elgg.org/wiki/Mod_rewrite_test .Dont forget to Check your .htaccess too

Thanks  Webgalli,  I have tested mod rewrite as you informed and its working properly. but, still i am not able to login and providing same "The requested action (register) was not defined in the system." . Can you suggest me that what i have to check in .htaccess. And i have installed new Elgg which is working properly.  Database path i have changed in "elgg_datalists" and "elgg_sites_entity".

Check the metastrings table too if the path exists there and run the upgrade script.

hi. shouvik, actually i have checked metastrings table but there is no path found for exited related with image folder name Or project name. now i am able to log in my system but background image in CSS is not displaying and even no header_footer is displaying. As a whole my theme related css is not in effect as well as no html form is showing. Please suggest me. Its urgent for me.

hi. shouvik, for your clear picture...i must tell that, i have developed the site on my local machine and now i am migrating this to a new server through FTP. If you know successful steps then please write to me.

Do this change htaccess_dist to .htaccess and your problem is solved.The .htaccess was lost during transfer.I faced this problem some time back and it solved it.

 Follow as anirup said. By renamimg htaccess_dist to .htaccess, you can make sure that, your htaccess is up to date.