Your primary source of SBCL support should probably be the mailing list sbcl-help: in addition to other users SBCL developers monitor this list and are available for advice. As an anti-spam measure subcription is required for posting:
https://lists.sourceforge.net/lists/listinfo/sbcl-help
Remember that the people answering your question are volunteers, so you stand a much better chance of getting a good answer if you ask a good question.
Before sending mail, check the list archives at either
http://sourceforge.net/mailarchive/forum.php?forum_name=sbcl-help
or
http://news.gmane.org/gmane.lisp.steel-bank.general
to see if your question has been answered already. Checking the bug database is also worth it See Reporting Bugs, to see if the issue is already known.
For general advice on asking good questions, see