REST Calls fails

Hello,

I am getting error for all free REST services calls which availble on net.

for example Google maps.

http://maps.googleapis.com/maps/api/geocode/xml?address=1600+Amphitheatre+Parkway,+Mountain+View,+CA&sensor=false

error getting as "HTTP/1.1 407 Proxy Authentication Required
Proxy-Authenticate: NEGOTIATE
Proxy-Authenticate: NTLM"

in XML I am getting like,

<big>Access Denied (authentication_failed)</big>

Strange is that - from Chrome browser i can get response xml but not in SOAPUI.

can you please let me know how to resolve it?

Regards,

Karimulla.