Would appreciate if you can let me know why when attempt to post new topics, the page bring you to the 'blank page'.
Plse help
Thanks Master! I'm a newbie!

System Admin -> Preferences -> PHP debug -> copy & paste error here -> submit

Thanks, but I can't get you? what is I go to system admin, preference, there has a debug mode off ( my setting ), you mean I need to turn it on & update? or what is copy & paste ? here?
Plse enlighten.thanks master!

When click new topics in the forum:(xoopsgallery)
Plse help master why when I ( log in as a register user ) click the new topics it show me the blank page.
Thanks!

it's on your own site, right?

Then you'll have an Administration Menu in your user menu.

Click that

hover over the system admin picture

select general preferences

scroll down to debug

select PHP debug

go to new topic in the forum

Instead of a blank page, you should get an error message

mark the error message

ctrl + c

go to this topic

reply

ctrl + v

submit

Thanks Mithy you're GOD.
The error message as below.plse advise.Thanks.

Fatal error: Cannot redeclare xoopscodetarea() (previously declared in /var/www/sg/include/xoopscodes.php:36) in /var/www/sg/include/xoopscodes.php on line 36
Notice [PHP]: Undefined index: xoops_lblocks in file class/smarty/Smarty.class.php line 626
Notice [PHP]: Undefined variable: boxstuff in file modules/shoutbox/blocks/shoutbox.php line 55
Notice [PHP]: Use of undefined constant shouttext - assumed 'shouttext' in file modules/shoutbox/blocks/shoutbox.php line 69
Notice [PHP]: Use of undefined constant _REFRESH - assumed '_REFRESH' in file modules/shoutbox/blocks/shoutbox.php line 113

2nd Problem is when click reply to any topics, it show just a white page like :
sample:
-----------
abcde
ddddd
------------

Plse advise .thanks Master