Error applying memory leak patch on squid2.1.patch2

hi,
 
        I've tried to apply the memory leak patch to my squid2.1.patch2 and
    this is the result of my patch.

#cd squid-2.1.PATCH2
squid-2.1.PATCH2# patch -p1 <../squid.2.1.PATCH2-clientHandleIMSReply-leak.patch
patching file 'Changelog'
can't find file to patch at input line 27
perhaps you used the wrong -p or --strip option?
The text leading up to this was:
-------------------------------------------------
| Index: src/client_side.c
| ==================================
| RCS file: /surf1/CVS/squid/src/client_side.c,v
| retrieving revision 1.420.2.14
| retrieving revision 1.420.2.15
| diff -u -r1420.2.14 -r1.420.2.15
| --- client_side.c 1998/12/09 20:50:41 1.420.2.14
| +++ client_side.c 1998/12/11 05:45:-2 1.420.2.15
-------------------------------------------
File to patch:

What do this output mean?
What next?

                                                                    Raul B.

    
Received on Tue Jan 12 1999 - 06:10:54 MST