I have to ask why you are importing from the PDF rather than the Word document? I think the latter might give better results.
One possible reason is that the link in Word was a cross reference rather than a hyperlink.
Also in the link that has worked it looks like there are two spaces after Click On.
BTW. You press keys on a keyboard, you click images and links on the screen.
See www.grainge.org for RoboHelp and Authoring tips
How you have inserted images in the document. I think there is some issue in that procedure.
Ideally you should insert image as object in word document.
Have a nice day
Thanks Peter for your response
I tried to use word document but it creates only one topic. Is there any way to get the topics based on style as the option available in importing pdf.