Installation problem.. pls help

[critical]

during installation it went smoothly..

 

after installation, when i try to go to admin or main page i get this error :

 

when trying to access default.php

 

Warning: main(DIR_WS_FUNCTIONSsessions.php) [function.main]: failed to create stream: No such file or directory in /home/virtual/site46/fst/var/www/html/catalog/includes/application_top.php on line 148

 

Fatal error: main() [function.main]: Failed opening required 'DIR_WS_FUNCTIONSsessions.php' (include_path='.:/php/includes:/usr/share/php:/usr/share/pear') in /home/virtual/site46/fst/var/www/html/catalog/includes/application_top.php on line 148

 

can anyone please advise or help..greatly appreciated

[critical]

hey can any kind sole help please.i am stuck down here