InfoPath Dev

Validation doesn't seem to work like it usually does. I have been using this to validate one ([a-zA-Z0-9_\-\.]+)@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.)|(([a-zA-Z0-9\-]+\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\]?) but I need to validate multiple within one text box separated by a comma. I tried to write the regex that would work in other languages but doesn't seem to work in infopath. I looked around a lot to see if there was a solution to this but could find none. Anyone have the regex for infopath that will work?

 I pinged a colleague of mine who has a better grip on RegEx - hopefully he'll have some suggestions here. :)

 It would be nice if you had posted the attempts you have made so far, but this seems to work. can you give it a try?:

 ([a-zA-Z0-9_\-\.]+)@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.)|(([a-zA-Z0-9\-]+\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\s*,\s*([a-zA-Z0-9_\-\.]+)@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.)|(([a-zA-Z0-9\-]+\.)+))([a-zA-Z]{2,4}|[0-9]{1,3}))*

It works! Thank you so much. Great help.