TOC not expanding when topic called

RoboHelp 10 HTML on Windows 7 OS to generate a FlashHelp project.

We implement "context sensitive" help by assigning specific screens in our application to specific help topics. When a user presses

<F1> from a certain screen, a specific help topic is called using a relative path.

Our problem is that when the user presses <F1> and the call is made, the TOC does not automatically open to

the correct book and page (it does not open at all) in Internet Explorer. This only occurs the first time the user presses <F1> from a screen with an assigned topic. When other topics are selected or navigated to, the TOC

automatically opens to the correct book/page. Has anyone ever encountered this or can anyone explain how to

ensure the TOC opens to the correct book and page when a user presses <F1> and a help topic is called?

Here is how it looks when the <F1> button is pressed and IE displays the topic. Notice the book(s) to which the topic is assigned are not opened.

Here is how it should look when the topic is called.

Here is the sample path.

file:///C:/[AppName]/Documents/Welcome_CID1.htm#ASN/About_ASNs_CID301.htm

Note: The "Welcome_CID1.htm" file is the default topic for the help project. The help project is large, so topics are assigned to sub folders (e.g.  "ASN"). The  "About_ASNs_CID301.htm" topic is displayed when a user presses <F1> from certain assigned screens in the program.

Thanks for any feedback or assistance.