F1 Displaying Multiple Windows etc

Hi,

I'm working in RoboHelp 8.0.2.208 to create WebHelp. We have done this successfully and implemented F1 help. F1 works....but with a few issues. We have a number of software products that use help. On one of the products you can press F1 and the correct topic displays. However, if you press F1 again for a different part of the product, and whilst IE is still open, the correct page is not displayed - the default home page is displayed instead but not of the links work.

On a different product the correct page is displayed but a new window is opened each time. I would have expected just the same window and the help page just to change.

Is there some setting somewhere that governs this or is it a developer thing? Seems at bit weird that there is different behavious forour different products.

BTW: We're using IE8.

Jac