But when I try installing it, I get a connection problem, also I tried re flashing from the start again but cant also as I cant even use the TFTP, but I can ping the router?
THis sometimes happens with FF or IE after huge changes on the router like flashing*, but only after you entered the initial pw. THis is just a borring problem: just close the browser (all windows if any - I say windows, not only tabs: the browser must be relaunched) and reconnect to the router.