There may be nothing wrong, as such, and I'm going to assume two things;
1. You are connecting wirelessly.
2. Your wireless adaptor is 802.11g
bit is what will restrict speeds to what you are getting, a 802.11n
wireless adaptor is what you would require, eg, a wireless usb dongle.
If I have assumed correctly, disconnect the wireless connection, connect to the router with an Ethernet cable and check the download speed with that, it should be near the full profile/sync speed.