Browser compatability problem

Hi All,

In my application there is a download functionality which prompts to open or save a excel sheet. The problem here is

this is working fine in IE6. But in IE7 , IE7.0.5730.11 it is working but in IE7.0.5730.13 it is not working.

Is there any way to make it work in that particular version other than installing the particular version.

Thanks!

Swarnarprakash