Gnomeish

Just set up a new Tekkit server. My friend can log on fine and such, but when he does an action - like place a block or swap to creative - it can take anywhere from 10 seconds to a minute for him to see the action. However, I see the actions on my end RIGHT away. When he places water, I see it. He dosn't. The server seems to be receiving the actions fine, but he can't see that. Any suggestions? :\