An error occurred while retrieving information from the NCP.

I am not able to download call records from NBX. This is what I have tried, I have Windows XP installed on my machine and recently upgraded my browser to IE 7. Now I am getting an error message that it cannot retrieve any records.
I have downloaded the IE version to 6.0 and then I am able to download without any error message.
I am not sure what could be the problem. Please help.
Error
An error occurred while retrieving information from the NCP.
There may be a problem with your network connection.
Error info: [12002 – Communications error: The request has timed out.]
