Please help me before I jump off a bridge!

Question

The thread title says it all.
I have an existing PDFthat someone gave me, it has no security set, and according to the security info I can print and change the document.
I cannot, I can highlight text, but cannot add or overtype it. Can anyone say why?
I am also trying to add some text to an end page, I want to add some contact details, tel no, and a hyperlink to a site, I cannot.
It does not seem possible to add this, I cannot type the text in. I tried to add a field, which (sort of) worked in that I could specify text content, it was not ideal,
I don't really want a text box I want text on the page, but it sort of worked. Can I add what is effectively a label text to a page?
Next whinge.
In the textbox I added a hyperlink (sort of) it was a  mouse action when you click it should open a hyperlink, not...
The hyperlink was set up, and try as I might I cannot get it to look right or make it apparent to the visitor that it is a link (mouse changes to a pointer, as with normal hyperlinks) .
When I key in www.google.com (or whatever) the www. part seems italic, or lighter text than the rest of this link text. (A way around is to make it all bold, yuk)
Another feature is that the url I was using had a 4th w in it, so www.whumbuglalalalala.com (e.g.) the document then insisted that the 4th w appeared not to be part of the hyperlink, so the www.w was lighter weight font, and the humbuglalal etc was a heavier weight (not bold)
In light of all the above, can anyone say why I cannot edit/add more text to an existing document. and can anyone please tell me how, or even if I can add a PROPER hyperlink complete with mousey pointer that will open a website from this document?
Why is this soooo hard, If I use word, and type in www.google.com then even word (stupid as it is) recognises it's a link, even this editor does!
I can't even do this on a new document, I'm using Acrobat pro 9. W Vista.
Thanks in advance for any suggestions.
McP

Answer 1

This was a text field box, font size 12 Helvetica, then I tried two methods of making a link.
Method one was on the Actions tab of the text field properties box, select the Actions tab, trigger mouse down/up  action Open a web link.
Method two, select the text drag highlight then tools advanced editing link tool, then carry out making a link process.
Both methods work (ish) and both show the lumpy text.
I have just spoken to a colleague who says (like you, it's an optical illusion, live with it!) It prints off ok so I will, but I'd be interested to know why it does this. (but it won't kill me if I don't find out)
As a matter of interest what is the best way to make a pdf doc? In a separate posting someone suggested to me, make the doc in word, then pdf it, so that you have the word doc as the original. Do you have any other/better suggestions?
Thanks Rob.