Frame -- Mif2go -- HTML Help Workshop Buttons problem

[Nancy Allison]

Hi, all. I'm using FrameMaker 10 on a Windows 7 system with mif2go and  HTML Help Workshop.
 
I can only activate the Next button in my .chm file. I've followed the instructions in sections 8.3.3 and 8.3.4 in the mif2go user guide and, of Next, Prev, Back, and Forward, only Next is activated!
 
My HHP file looks like this:
 
[OPTIONS]
Binary Index=No
Binary TOC=Yes
Compatibility=1.1 or later
Compiled file=SupportOnlineHelp.chm
Contents file=SupportOnlineHelp.hhc
Default Font=Arial,8,0
Default Window=main
Default topic=Welcome.htm
Display compile progress=No
Full-text search=Yes
Index file=SupportOnlineHelp.hhk
Language=0x409 English (United States)
Title=Support Help
[WINDOWS]
main="Support Help","SupportHelp.hhc","SupportHelp.hhk","Welcome.htm",,,,,,0x3520,,0x60383e,,,,,,,,0
[FILES]
*.htm
SupportHelp.hhp
[INFOTYPES]
 
In the HTML Help Workshop "Window Types" window, "Buttons" tab, I've selected Back, Forward, Next, and Prev, among others.
 
Why is only the Next button being activated? What am I missing?
 
Thanks very much.
 
--Nancy