Linux =?ISO-8859-1?Q?server=92s?= memory

Hello all,

   Sorry if this is kinda off topic. But I need advice on my server�s memory problem.

   I�m running RH 6.1 ( OS  - 2.2.12-20 ) on Compaq Proliant 2500, 200mhz, 64 MB RAM 
and 18.2 GB hard disk. It is connected to 100mbps speed. It is a web mail server. 

  The problem is that when I used �free� command to check on it�s memory, here�s what 
I�ve got :

                total        used       free     shared    buffers     cached
Mem:            14460      14176        284      12276        820       3984
-/+ buffers/cache:       9372       5088
Swap:           136512      10272     126240    

And I�ve got the similar result when I used these commands too :

1. dmesg | egrep "Memory"

2. more /proc/meminfo

        Another problem is that it is too slow when we want to access the server�s web 
sites though there were only 2 users accessed it .
 
         We've tried to change / add more RAM but it still gives the same amount of 
memory (around 14MB instead of 64MB).

Thanks in advance.

AYeJay.