Use this to help build your expression:
http://regexpal.com/

Additionally instead of explicitly entering the spaces try using the whitespace character-thingy \s with a star(or lazy star) repeater. Something that looks like this:
Code:
<td>\s*<tr>
When I took a look at your page source I saw a lot of extra white space between tags, that's why I suggest this. It may not solve your problem.

This will help witht he special characters and syntax: http://www.regular-expressions.info/reference.html