Change of Servers Causing Issues

I am moving a website from one server to another and now get this error when trying to login to the admin
Warning: session_start() [function.session-start]: open(/tmp/sess_5c69a72d5fc2d463c54c309e888270ca, O_RDWR) failed: Permission denied (13) in /home/cobblers/public_html/includes/ on line 2
 Line 2 is the session start line
$checkvar = session_start();
if (!isset($_SESSION['username']))
      header('Location: login.php');
$username = $_SESSION['username'];
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Shinesh PremrajanEngineering ManagerCommented:
In the php.ini file you need to set the session path, and that path folder should be writable by PHP.

hope this helps
Ray PaseurCommented:
It sounds like /tmp/ is lacking the required directory permissions to let PHP write into it.  Who is your hosting company?  They should be able to fix this immediately.  Depending on your OS, etc., your PHP scripts are probably running as "nobody" so giving "nobody" the permissions is a good first step.
katleesAuthor Commented:
Here is another twist - if I access this page from my home - I can see it and it all works well. When I am in my office, on the same laptop, I can not. So I am hesitant to change anything on the server.
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Ray PaseurCommented:
Sometimes browsers will cache pages, but if you're using the same computer and the same browser and getting different results when you connect via different networks, it somewhat narrows the scope of inquiry.

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katleesAuthor Commented:
I cleared my cache and internet files, rebooted and it works..
Ray PaseurCommented:
Excellent!  Thanks for the points, ~Ray
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