The last paragraph of the following is pertinent to the specific problem described,
tho I have added other info for your perusal.
Should you wish to view more info with illustrated steps, please check out my source at
http://www.windowsnetworking.com/articles_tutorials/Windows-Vistas-New-Improved-Remote-Assistance.htmlCompatibility
Most organizations probably arent going to switch all of their users to Vista overnight, so you might be wondering about whether or not the Vista version of Remote Assistance is compatible with the Windows XP version. The two versions are mostly compatible, but there are a few minor issues...............
One issue is that Vistas version of Remote Assistance supports pausing a session. Since the Windows XP version didnt support this feature, someone who is using Vista to assist someone running Windows XP can pause the session, but the person who is running Windows XP will not be notified that the session has been paused.
A more important issue is that a person who is running Windows XP will not be able to offer assistance to someone who is running Windows Vista. Therefore, if your organizations help desk depends on Remote Assistance, then you will probably want to make sure that the help desk staff are the first ones upgraded to Windows Vista.
Also.....................
Efficiency Improvements
One way that Remote Assistance has been improved is that it is designed to be more efficient. The Windows XP version of Remote Assistance tended to be difficult to use in low bandwidth situations. As such, the Windows Vista version of Remote Assistance has been re-engineered to use less bandwidth. In doing so however, one feature was removed. In the Windows XP version of Remote Assistance, it was possible to verbally communicate with the person that you were helping. The verbal communications feature has been removed from the Windows Vista version of Remote Assistance in order to conserve bandwidth.
There is an amazing pack of free network admin tools.
click here to download it