Bugs in hosting in Shared Server

[29-Oct-2010 15:39:33] 0:admin:session.inc:269:[before upgrade] include_once(../company/0/installed_extensions.php) [<a href='function.include-once'>function.include-once</a>]: failed to open stream: No such file or directory
[29-Oct-2010 15:39:33] 0:admin:session.inc:269:[before upgrade] include_once() [<a href='function.include'>function.include</a>]: Failed opening '../company/0/installed_extensions.php' for inclusion (include_path='.:/usr/lib/php:/usr/local/lib/php')
[29-Oct-2010 15:39:33] 0:admin:Unknown:0: Unknown: open(/home/hcsbpoco/public_html/demoaccount/includeshome/hcsbpoco/public_html/demoaccount/tmp/sess_0c981faf7955bf44e88c8f23d6d82c39, O_RDWR) failed: No such file or directory (2)
[29-Oct-2010 15:39:33] 0:admin:Unknown:0: Unknown: Failed to write session data (files). Please verify that the current setting of session.save_path is correct (/home/hcsbpoco/public_html/demoaccount/includeshome/hcsbpoco/public_html/demoaccount/tmp)

this is the error i am getting i am not able to save any entries or Create any customer or save any invoice due to the above error