Acrobat Security Issue JAVASCRIPT NOT WORKING FOR HANDLER

I am trying to execute javascript code like

var myEngine = security.getHandler("Adobe.PPKLite");

but it is not working it will give error as following

Error Message ::::

"NotAllowedError: Security settings prevent access to this property or method."

Please Suggest me some trick to prevent my document from security exeptions

thank you

Jaylem Chaudhari