newbie help with exclude rule

[maphew]

I'm having trouble constructing an exclusion rule pattern that does what I want.

url:

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http://www.google.com/url?q=http%3A%2F%2Fwikipedia.nd.ax%2Fwiki%2FAmerican_black_bear&sa=D&sntz=1&usg=AOvVaw3tfof_60tw7mjXrlHgr0fN
I want to exlcude any url that starts with

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http://www.google.com/url?q=.

In Edit Rule I have the expression

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^http://www\.google\.com/url\?q.
I'm confused about which Compare type I should use. No matter which one I pick, the Rule Checker shows "Not Matched". What am I doing wrong?