Captivate 6 - How to get cursor in a text entry box without clicking on it

I am creating a simulation where the user needs to enter an e-mail address in a text entry box and then click tab to move to the next slide. The simulation will be accessed through an LMS and the problem I have is that the cursor does not appear in the text entry box automatically - instead the user must click on the text entry box before they can begin typing the e-mail address.

When I preview the slides, it works fine, but when the .htm or .swf file are played back, the cursor is not in the text entry box - instead the url in the address bar of internet explorer is highlighted.  I have to click on the actual text entry box to get the cursor.

I have searched the forum and cannot find a fix that has helped.  Any ideas?