Permanent Resident Travel Document I'm Permanent Resident In UK, I've Got A Travel Document. Can I Use It To Go And Visit My Cousin In America?

I'm permanent resident in UK, I've got a travel document. Can I use it to go and visit my cousin in America? - permanent resident travel document

I was invited by my cousin for his part, in April 2008. I do not have a national passport, but a travel document. Is it possible to go to America to use?