IE doesn't automatically open ASP pages - prompts to open or save

[anthonyaa]

I have a weird issue where asp pages are not auto loaded in my IE6 SP1 browser. Im prompted with a File Download dialog box with the following:

Some files can harm your computer. If the information below looks suspicious do not open or save this file:

File Name: Search.asp
File Type:
From:

http://www.dymocks.com.au

This type of file could harm your computer if it contains malicious code. Would you like to open or save it to your computer?

The weird thing is if I go to the Secure site (eg

HTTPS://www.dymocks.com.au)

and do the same thing, I don't get this box and the asp page loads straight away

Anyone know what setting controls this - i always want asp pages to load automatically

Thanks