Blank store page Please help

Hi, Please can anyone help?
My store has gone blank!
Using version 1.3.8
I have scoured the forum and spent time talking with my hosting provider EUKhost but still no joy.
All was ok 6 weeks ago. I checked it 4 days ago and it was blank.
I restored from a backup but still blank.
Eukhost restored from theier backup but still blank!
If it helps my site is https://www.gothic-fusion.com/store
I uploaded the debug file enable_error_logging.php and got:

[03-Sep-2009 20:43:40] PHP Warning: require(DIR_WS_TEMPLATEStemplate_default/common/html_header.php) [<a href='function.require'>function.require</a>]: failed to open stream: No such file or directory in /home/gothicfu/public_html/store/index.php on line 43
[03-Sep-2009 20:43:40] PHP Warning: require(DIR_WS_TEMPLATEStemplate_default/common/html_header.php) [<a href='function.require'>function.require</a>]: failed to open stream: No such file or directory in /home/gothicfu/public_html/store/index.php on line 43
[03-Sep-2009 20:43:40] PHP Fatal error: require() [<a href='function.require'>function.require</a>]: Failed opening required 'DIR_WS_TEMPLATEStemplate_default/common/html_header.php' (include_path='.:/usr/lib/php:/usr/local/lib/php') in /home/gothicfu/public_html/store/index.php on line 43

Any ideas?
I put a lot of work into this site and now it's vanished!

Thanks in advance (finger crossed)
Eagerstudent.

Hi.
Here is tutorial https://www.zen-cart.com/tutorials/index.php?article=82 and file : http://www.zen-cart.com/index.php?main_page=product_contrib_info&products_id=860
Upload file to includes --> extra configures folder, test your home page (press enter) and check error report in cache folder on your root directory .

Thanks but I posted the error log result in my 1st post

Starting go to a bit crazy.
The entire store has been restored from a backup but it is still blank. I asked my hosing company if they had patched the server? they said no!
Really would appreciate some help.

Regards,
Eagerstudent.

sorted! :smile:

/includes/configure.php was the wrong version. it was the admin version.

Strange thing is though all 10 of my backups going back 3 months all had the wrong one ???