My acer aspire one wont connect to internet. it says it is connected to wireless, and i have wired it to modem but the problem still persists. please help.

Based on your description, the following is assumed.
1. The service to your Internet Service Provider is through a cable or DSL modem.
2. Internet service was initially set-up with your netbook directly connected to the modem.
3. A wireless router was since added and is using the direct wired connection to the modem.
4. The netbook is connected to the wireless access point being provided by the router.
5. The netbook says it is connected to the wireless access point but still no internet access.
The problem is likely due to the modem capturing the MAC address of the netbook when access to the internet servce was initially set up using the netbook directly connected to the modem and now the modem will only allow access with the netbook directly connected to it. You can check this out by reconnecting the netbook directly to the modem. It may be possible to "flush" the captured MAC by unplugging the AC power to the modem, waiting a few minutes and then powering back up with the router connected in place of the netbook. To make it easier, you may want connect your netbook directly to the router's LAN side to check if you now have internet access through the router. If you still don't have internet access, you will need to use your netbook to log onto the router to clone your netbook's MAC address for the router's WAN connection. The router's user guide/manual has directions on logging in and doing the MAC address clone. It will also have an explanation as to what is a MAC address.