WN2000RPT - Slow Wireless + Drops Connection

Hello,

I have two 'WN2000RPT' dotted around our farm. Both are wirelessly connected to the main router, which is also a NetGear (DGN1000). All the repeaters are within range to my main router.

For some reason, the wireless/wired on the WN2000RPT is really slow, I'm getting around 2.4 MB/s download speed, which is awful. The wireless speed on my main router is around 20 MB/s. All the lights on the repeater are all green.

Here are my specs/settings:

Main Router:

Channel 11(P)+7(S)
Security WPA2-PSK

Repeater:

Connection Status Connected
Link Rate 150 Mbps
Channel 11(p) + 7(s)

If you need any other details, I'll be happy to post them.

Could someone please give me some advice why the repeaters are so slow?
I've spent a lot of money trying to get the internet working on this farm, would be nice for it to actually work.

Thanks