Ehm, try this:
1. Reseting your Router
2. Unplug all cables from your modem/router. wait 10-20min then replug it.
3. Update all your drivers, in like: Windows update, or any kind of updating program ( See google ) "Driver updater"
4. If still, Reinstall Warrock.
5. Clean your C: Drive, Defragment, and clean cookies ( CCleaner - Search that on google )
If it still doesn't work, i can't help you buddie