mono System.DllNotFoundException: xul

[email protected] Wed, 18 Feb 2015 02:02:11 -0800 (PST)
Newsgroups gmane.comp.mozilla.devel.xpfe
Message-ID <[email protected]>
Hi im using geckofx on mono on linux 32 bit. i get System.DllNotFoundException: xul, but dont know how to install xul. can you pls help?

thank you