[pmwiki-users] markup question

[noskule]

hi list
could someone please take a look at this markup. I cant get it to work. 
It should rpoduce a fieldset:

code:
Markup('fieldset', '<split',
    '/\\(:fieldset (\\[\d\s\w]+):\\)(.*?)\(:fieldsetend:\)/s',
    "<fieldset>\n<legend>$1</legend>\n$2\n</fieldset>");

markup:
(:fieldsset fielname:)
XXX
(:fieldssetend:)

resut:
<fieldset>
<legend>fieldname</legend>
XXX
<fieldset>

thanks for any hints
nos