I can't get this to work...

[vBulletin THEN DAYLIGHT]

I am trying to create a new user option, so each user can choose whether they would like to see images in peoples signatures or not without having to turn off signatures altogether.

I have created the profile field, and done all the basic checks like for the ID etc... but it won't work

I have.....

Product: vBulletin
Hook Location: global_start

PHP Code:

if ($vbulletin->userinfo['field29'] == "Display")
{
    $vbulletin->options['allowbbimagecode'] = 1;
}
else
{
    $vbulletin->options['allobbimagecode'] = 0;
} 


I have already tried true and false instead of 1 and 0. Any ideas on how I could get this to work???

Thanks
Rob