posting excel file online.

I need help Posting Excel file online properly with Auto Filters.

I have an XLS (excel) file that I'd like to post online on my website. The file has auto filters enabled. But when I post it and view it on a certain versions of Internet Explorer, the file does not display properly, the autofilters are messed up.

I tried looking at other websites that host XLS files with auto filters, yet they view properly. Is there something I need to do to ensure proper viewing? Any help is appreciated, thank you!