Linux: Memory Upgradtion problems

How do I make Linux recoginize my memory upgradations?
I recently upgraded my memory from 16MB to 40MB. I've tried
typing linux mem=40M at the lilo boot but the system hangs
while adding swap space.
My version of linux also hogs memory irrespective of the
number of users/processes. Initially the system is quite
fast but as time progesses, it becomes slower & slower.
Maybe swapping of pages from memory is not as efficient as
it should be.
Kindly suggest a solution.

I'm using the following version of Linux :

    Redhat Linux Release 3.0.0 ( Picasso )
      Kernel 1.2.13

  I'm on a Compaq with a 75MHz Pentium Processor
dennis1Asked:
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pc012197Commented:
1. Upgrade to a 2.0 kernel
2. Was the kernel you use built with "Limit memory to 16MB" set to YES?

0
ping0621Commented:
Follow the comment of PC.
Recompile your kernel with 'Limit memory to 16 MB' set to NO.
0

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