Paypal IPN 404 errors

Hi Guys!

We just joined up so we can check out the membership plugin as membership sites are a bit of a speciality for us. I’m really liking the plugin – great features!

I’m having an issue with receiving requests from the Paypal IPN though. They never get received, and as they aren’t received the user’s account is never made active.

The IPN is trying to contact this page, but reporting a 404:

http://dev.bigspring.co.uk/cpst/downloadspaymentreturn/paypalsolo

If I visit the link, I get a 404 myself.

Can you help?

Thanks!