Sitecore 301 redirect module IIS error 0x800703e9

I am new to .NET and Sitecore everything was fine I was getting use to Sitecore and the way it works, then I decided to install the 301 redirect module, I did some research and the error seems to be cause by stack overflow and all my redirects receive this error in a 500 page:

**Detailed Error Information**
------------------------------
        Module ManagedPipelineHandler

        Notification    ExecuteRequestHandler    
        Handler ExtensionlessUrlHandler-Integrated-4.0  
        Error Code  0x800703e9

my regex pattern is formatted like this:

/([^/]+)(?=/[^/]+/?$)

The patch for my item is like /Home/solutions/exemple which is supposed to send: www.mysite.com/en/exemple

my solution is running in asp.net 4.0 and Sitecore 7 and I have two version EN and FR.

Any Idea how I can fix this error or someone who ran in a similar issue?

ps: How can I delete the redirect from this module because even when I delete them they are still active.