File Upload Performance using IE from Windows to Unix via HTTPS

Hi,
Is there any performance issue uploading a file
using IE from Windows client to UNIX server via HTTPS?
Before that, we were using HTTP protocol and everything run smooth
Once we change to HTTPS, we might hit the "HTTP 500 Internal server error"
Even though this does not happen all the time but still, it affect the overall performance of our system
We'd tested other browsers such as Netscape, Firefox, Opera and we don't hit any problem with them
Is there any way to improve the performance?
Is there any site i can refer to? cause i need some explaination on how this could be happen
Thanks

Is there any performance issue uploading a file
using IE from Windows client to UNIX server via
HTTPS?With HTTPS, the contents of the files are encrypted while uploading. This might hit the performance in some cases.

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