Call to a member function isLogged() on a non-object in

Hey I am having a real headache here, cant login to the ADMIN side of the website, Just have a blank white page.. Looking at the Error_Log here is the issue

[23-Jul-2012 13:43:28]
PHP Fatal error: Call to a member function isLogged() on a non-object in /home/ACCOUNT_NAME/public_html/catalog/model/catalog/product.php on line 8

Back story, = Everything was working fine the last change i made was swapping the domain to a new one on friday,
after changing the to the new name via root config + admin config everything appeared fine. BUt over the weekend i stopped being able to login

I have now tried uninstalling vqmods, then unistalling vqmod altogehter, I have tried updating all new files (accept configs) with orignal OC files and still nothing

I have looked all over before posting, any help would be really great

thank you in advance

dm

SCRAP IT... SKOOL BOY ERROR!!!!!!

just typing the above made it obvious that the error had to be with the config file... remade and reuploaded.. FIXED

@bigdm

Would you please share what change you did in config.php & admin/config.php? Because I am going through the exact problems that you described - being logged out, then this error. Will help me get over an impasse. Thanks.

Hi I also have this exact problem and the error on Line 8.

Can anybody please let me know how this is fixed?

Thanks.