regularExpressions url-rewriting

Hi

i would like to match a part of my url with regularExpression to replace this part for url-rewriting

This is a sample

 Dim strtext As String = "http://www.mydomain.de/17/0/0/hallo-welt.aspx"
 
 I want to match this part 17/0/0/hallo-welt.aspx

I use this regExp
 Dim reg As New RegularExpressions.Regex("(\d+)\/(\d+)\/(\d+)\/\w\.aspx")
 
 but there is no match.
 
 What is wrong?
 
 Can anybody please help me?
 
 Thank you.
(sorry in advance, if this is not the right Forum for my question)



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