caching data on server in windows application

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C#3.0

C#

Hi,

We have a windows app which is installed in many systems..and the server is resided
on different PC..so whenever users loading the app due to many hits to server..the application is becoming very slow..
so i tried to use caching the data ..with expiration..(as we dont have any db changes during expiration time..)

i tried the below article which was posted in codeproject...
http://www.codeproject.com/KB/cs/webservicecache.aspx

but this article explains to cache data locally..but i need o cache the data in the server...so that eventhough many users run the app the load will be less...

Please help me regarding the same..