Multiline event not working

[ngvella]

I've tried several different configurations and can't seem to get this to work. I have a log file like:

"3/23/2014 4:41:16 AM - Start String"
"3/23/2014 4:41:16 AM -     data"
"3/23/2014 4:41:16 AM -     data"   
"3/23/2014 4:41:33 AM -     data"
"3/23/2014 4:41:33 AM - Finished"
"3/23/2014 5:24:34 AM - Start String"

I've tried a lot of different configs here was my last try:

props.conf

[sourcetype]
SHOULD_LINEMERGE = True
BREAK_ONLY_BEFORE = Start\sString

Trying to simplify it. i previously had it BREAK_ONLY_BEFORE = regular expression date+ "start string" but it always just does one-line-per-event.

[ngvella]

Embarassingly i didn't have the file in /etc/system/local

[MuS]

two things pop up here: does the sourcetype match and is your regex string on a new line?