@soxrok2212
Firstly, I apologize for late reply.I have got exams, last few days have been pretty intense.
1) I tried without --dh-small-keys, but no luck
Still WPS pin not found.
2) I've mailed to your old email-id the reaver outputs.
3) yea and the spaces between enrollee key :|
tried pixiewps with correct syntax but no luck
It says AP might be vulnerable try bruteforcing.
Tried with --force couple of times but pin not found their either.
@DetmL
It is D-link DSL-2750U rev U1
Wikidevi link: https://wikidevi.com/wiki/D-Link_DSL-2750U_rev_U1