HR in the pool
My rig is mining at 5.195 kH/s, but the stats page shows

```
Pool HR: | 0 H/s
Network HR: | 317.36 MH/s
Blocks found: | 0
Last block found: | None yet
Payment threshold: | 0.33
Pool fee: | 0.01
Pool port: | 4242
Miners connected: | 3
Your HR: | 593 H/s
```
Any idea why the HR in the pool is much lower?