Better ASN

Could someone decribe how I'd instantiate an object then add it to a tree insertion? The following code doesnt seem to actually do it:

ASN1Object a = ASN1Object.decodeNext(s);
ASN1Object a2 = new OCTETSTRING();
a2.setValue("test1234");
a2.setParent(a);

Thanks.

PS - GREAT project!, but I never found it till today- after a year of looking for something like this; must be not-so-good marketing :-)