coping and paste Problem

ok i've been using firefox for ages but only recently i've been having problems with it i'll see if i can show ya ok first say if i wanna copie something from one tab to another

when i go to paste it won't work

im thinkin now i might not only be firefox i tryed to do the same with IE to FireFox and i did the same thing i have to cope from firefox/ IE to notepad or word then paste back into firefox / Ie to get it to work
please any help would be great

Ps sorry if the pics are a bit big and the second pic is kinda stuffed but you can still see anyways