Hi Lee,
use this: /^connectionTimeout="60000"\s+.*$/m
The reason your regexp did not work is because "\s*$" means: zero or more spaces followed by end of line. What I did "\s+.*$" means:
\s+ - one or more spaces
.* - any character zero or more time
$ - end of line
This will match your string
connectionTimeout="60000" asdf
but not
connectionTimeout="60000"asdf
which would be probably bad entry in the config file.
Great resource for learning regular expressions is http://www.regular-expressions.info/
And also CCS uses .NET implementation so if you want to test your regexp you can use http://regexhero.net/tester/ or some other online/freeware tester.