My Routers extender gives me limited acces when it's on?

[Jack]

Whenever my routers wireless extender is on, my computer get a stronger signal strength but I get limited access. If I switch it off I get a weaker signal strength but I can access the Internet.

I've tried adding the Internet connection again and then with the settings but I can't get nothing to work. Any suggestions would be greatly appreciated.
Thanks

[Tech]

Its seems like your extender has may not configured properly but before that you can try it by simply restarting your router and extender both. Alternately try to re-configure your extender with your router and try connecting again. If the problem still persist then it can be either a compatibility or device issue. Good Luck