Hello
when you say its slow what do you mean?
The performace of a RAP in a remote site depends on many things...
Do you have it on tunnel mode? bridge mode?
How much is your upload BW on the remote site? it is 1Mb? because if its like it then thats what you will get just 1 mb... to the central site if it need to do something in there.(if you got it in tunnel mode)
What RAP do you have? the IPSEC trhoughput its different from every model of AP on rap mode... in some you will get more BW than others.
What kind of application you are using on the remote site? it is a client server app? how much BW do you need on if to make it work properly? do you know?
There are many things that you need to take in mind when you are deploying RAPS, or any site to site VPNs.
Cheers
Carlos