Help with trade URL pls

[Mushi]

I need to update my steam trading URL and i try to. I go to my url and click "Change URL" after that i cant do anything and i have tried everything to change it but i've had no luck. help please

[Tev]

It works fine for me?
http://steamcommunity.com/my/tradeoffers/privacy

Whatever the issue is that you're having, do you have the same issue on your web-browser, if you try?

[Mushi]

I highlight the text and i cant delete it or copy and paste something instead of it. It just wont let me

[Tev]

You're supposed to click [Create New URL] and it should bring you up a prompt, which looks like this (very) roughly put:

Create new URL
Creating a new URL will make your previous URL inactive and any shared or posted links will no longer work.
Create new URL
Cancel

You can't do anything with the Trade URL there but highlight and copy.