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Hi, I'm not sure why your unable to click on the Profile link when you hover over the posters name to the left of their post, sorry.
But to make a Topic Sticky, post your topic as normal, and once it's done, go back into that topic and hover over the 'Topic Options' link at the top.
Then from that list choose 'Make This Topic Sticky'. It will take you to another page where you just press on a button labelled 'Sticky'.
To Unsticky the topic, repeat the steps by hovering over 'Topic Options' then click on 'Make Topic Unsticky'.
Hope this helps :)
I used to be Indecisive ... but now I'm not so sure