Navigation only displayed on homepage

Hi all,

It's come to the point where I've decided to post for issue support, as it is critical that I get this working.

Currently, my navigation block/left sidebar and all other source code content critical to drupal operation is only displayed on one page, the homepage. When I go to click on a link it will take me to the page, that is simply blank. The print sidebar and navigation is gone from the source code, so the page appears as just the design and nothing else.

I have another forum topic based around this issue, where you will be able to find code from my source and home page.

http://drupal.org/node/178061

but support has dropped to a minimum, and it's beginning to seem that I am the only one with this problem!

Thanks for any help in advance
I'm desperate for help!!

Jon.