Have you tried single quotes instead of double quotes?
Backslash before the space?
Parentheses around the whole string [may require \( and \)]?
Putting in the concatenation dot (.) where the space is?
Combinations of the above?
Is there any documentation for the product that tells you whether it uses "Regular Expressions" (or modified "Regular Expressions")? Sometimes quoting/escaping tapes some persistence but sometimes its just not allowed.
Have a look at what I wrote about bizarre awk example for quoting/escaping in this other thread:
http://www.linuxquestions.org/questi...75#post1913075