Trouble ignoring events

[_smp_]

I'm having some difficulty forcing Splunk to ignore events which start with a '#' character. The file is compressed, but the events appear to be indexing OK. Here are my props and transforms - is there anything obviously wrong here?

[source::/logs/proxy/SG_proxyna_SIEM__1920629171951.log.gz.processed]
NO_BINARY_CHECK = true
invalid_cause = archive
unarchive_cmd = gunzip -c -f -S .processed
TRANSFORMS-comments = setNull
TRUNCATE = 20000
TIME_PREFIX = ^
MAX_TIMESTAMP_LOOKAHEAD = 19

-
[setNull]
REGEX = ^#
DEST_KEY = queue
FORMAT = nullQueue

[MuS]

or a Heavy weight forwarder - don't forget to restart the Splunk instance after you added the config files.