set specific forum have different button

[squawell]

Logician i put the code :PS:there have sapce !!

PHP Code:

if ($forumid==X) {$my_button='<img scr={imagesfolder }/XXX.gif>';}
else {$my_button='<img scr={ imagesfolder}/xxx.gif>';} 


above

PHP Code:

// draw nav bar
$navbar=makenavbar($threadid,"thread",0); 


and in showthread template i replace

PHP Code:

<a href="newthread.php?s=$session[sessionhash]&action=newthread&forumid=$forum[forumid]"> <img src="https://vborg.vbsupport.ru/images/newthread.gif" border="0" alt="?o???s?峹"></a> 


TO

PHP Code:

<a href="newthread.php?s=$session[sessionhash]&action=newthread&forumid=$forum[forumid]"> $my_button</a> 


and it doesnt work it look like the attachment file......

whats wrong with my code?