Error from Upgrade v1.19 to v1.2

[Handy]

Dear Admin, I have upgrade from v1.19 to v1.2 in AbanteCart and now the site is down. Please help.

TQVM!

[Handy]

For your info, I have clear all history and cache. Rest F5, all tested and is still the same. I have contacted my web hoster and they said I have to come back to you (developer).

Thanks You!

[yonghan]

Hi,have you change the permissions as described here? http://www.abantecart.com/ecommerce-documentation/user-manual/installation/core-upgrade

First login into your CPanel/FTP account,go to system folder, open up the logs->error.txt, copy and paste the logs here, don't copy all of it,just from from the time you upgrade it.