428058 Paypal Ipn got disabled and need it to get re enabled

I have been getting this message from paypal and now my IPN is disabled even though its enabled in paypal.I want someone who can fix this probem for me.I am willing to pay 50$ for it Hello mridul kharar, Please check your server that handles PayPal Instant Payment Notifications (IPN). IPNs sent to the following URL(s) are failing: [login to view URL] If you do not recognize this URL, you may be using a service provider that is using IPN on your behalf. Please contact your service provider with the above information. If this problem continues, IPNs may be disabled for your account. Thank you for your prompt attention to this issue. Thanks, PayPal