Regex not assigning a value to a variable

Ok, I'm assigning 500 to what should be an easy question but 1) I need it quickly, and 2) it's driving me nuts.

Why doesn't "Event Log Watcher" get assigned to $process in the script below.  I only get "Event Log".

#!/perl

use warnings;
use strict;

my $trap = 'Host:Windows_NetServer Windows_NetServer caiWinA3 Poll WinA3_ProcInst OK Critical Event Log Watcher';
my $regex = '.*ProcInst\s+(?:Warning|Critical|OK|Unknown|Repaired|Up)\s+(?:Warning|Critical)\s+(.*)';
( my $process ) = $trap =~ / $regex /;
print $process;
exit;Start Free Trial