[RESOLVED] Problem in creating new link in my signature

Hi. Whenever I need to add a new link in my signature, i go to Inbox>then Edit Signature> and there I click on LINK icon and a dialog box appears for pasting the URL into it. Whenever i paste the URL and press the OK button, the link is pasted twice, inside the LINK tag. When it's happening like this.? Am i doing it wrong way? Please guide me.