how come i can't even log on the manage?

cause you are using the wrong ip to log, try 192.168.0.254 if no go, check the IP using this tuto http://www.tp-link.com/en/article/?faqid=373

i can use the wireless

Who ever sold it to you enabled DHCP
The easiest, default the 901, here http://www.tp-link.com/en/article/?faqid=202
Set your PC's IP address manually http://www.tp-link.com/en/article/?faqid=14 this tuto is using a dif ip from your 901 set your Lap ip to 192.168.0.100 now open your browser and type 192.168.0.254 Web UI should prompt, user admin password admin
In case you use Nod antivirus read here http://www.tp-link.com/en/article/?faqid=358