We are getting the following error trying to submit a transaction through Sagepay:

4020 : Information received from an Invalid IP address.

We have entered the following IP addresses into Sagepay:

208.76.24.0 22 255.255.255.0
69.7.30.0 24 255.255.255.0
67.131.25.0 26 255.255.255.192
63.226.35.128 25 255.255.255.128
72.166.76.64 27 255.255.255.224
72.9.198.96 27 255.255.255.224
72.9.221.160 27 255.255.255.224
72.9.221.48 28 255.255.255.240
216.27.233.96 27 255.255.255.224

Any suggestions to help get this to work? Sagepay has asked us to submit the transaction to: https://test.sagepay.com/showpost/showpost.asp but the Infusionsoft rep just told us to submit the transaction from an order form on our server (not the Infusionsoft server). Any help would be greatly appreciated. Thanks