IE7 problem with proxy?

Hi, I have broadband in my office. I installed the proxy software on your computer and analog Internet access to broadband through that. my problem is that if I use Opera web browser i can access the Internet without any problems. but if you want to use the Internet via my Internet Explorer 7 with the correct proxy settings also am not able to access all sites. For example I have set my words to access the Internet through proxy if I can go to www.google.com and search anything does not work properly if I click on any link given by google Google will show me error page can not find the page. if you give me a name other website in the address bar also retrive it. I do not know what happens if I have connected to the Internet directly I can access all sites without any problem. the problem is not with the proxy since it is working fine with my Opera .. suggestme kindly

Why is using a proxy on your own computer? just get rid of proximity software and configure any web browser to use.

How to use a http Proxy with IE7