Upgrading Drupal

I am very new to Drupal. I got a working 5.3 site, then upgraded to 6.0. I have searched and read the support documentation but cannot find where to correct the following error that is reported in the status report after running cron:

user warning: Unknown column 'status' in 'where clause' query: SELECT * FROM files WHERE status = 0 and timestamp < 1195997216 in /Users/sitename/Sites/drupal-5.3/modules/system/system.module on line 1104.

Can anyone please help?

hello, i just upgraded a test site to 5.3 and when i check the status report for the site it still shows the site at the 5.2 version. How can i verify that the 5.3 upgrade was successful? Thanks in advance.

after upgrading drupal beta 2 to beta 3
in the forum pages shown this text " You are not allowed to post new content in forum " for all user.
I disabled all modules after upgrading and then enabled these again but this error not solved.
please help me quickly!

my website is http://testd6.irdrupal.com/

after upgrade drupal 6 beta 2 to beta 3 I have errore for reply comment
by clicking on the relay coment or post new coment shown a snowy page .

this text report after upgrading :

Greetings all,

I am new to drupal and have been asked to help upgrade from 4.7.4 installation to 5.3 and currently backing up information and wanted to verify that all is in order, before proceeding!

The concern is over the requirements, as our hosting is with hostgator and our php version is 4.4.4 and mysql is 4.1.22-standard and it seems 5.3 runs on a clean install fine and just wanted to make sure the upgrade and all is feasible in the current environment.

As I read this on the requirements page and was not clear on how it related!

Hi, I just finished migrating my Drupal install to a new server. In the process I installed the latest version of Drupal and all of the modules that I use, ran the update script etc and now everything seems to be working fine except I get this error on every page:

http://martindoms.com/drupal-error.JPG

Anyone know what it means? To get my database moved over I used the Backup and Migrate module, FWIW. Any help would be greatly appreciated.