[Typo3-UG UK] php class in the template

[Magdalena Muskala]

hi, 
i have an id="header" in my html site. 
i have also a small html class, that i wanna use in my template[everything 
works when i include it to the page as php record]. 
buit i'm not able to use it in my template. 
i wrote in the template  
page.includeLibs=fileadmin/bz.php   
subparts.header =TEXT  
subparts.header.VALUE=bz->getSubitle  
but it doesnt work 
 
tried also  
subparts.header < bz->getSubitle  
but it also failed.  
 
bz->getSubitle() is wrong as well. 
 
could anyone help me to fix it? 
 
tia 
greetings 
magda <muskala at biozentrum.uni-wuerzburg.de>