Revision in source code getting modifed

[Satya Prasad DV]

hi,
   Iam having a weird problem with CVS. We have recently checked in some 
source code into CVS. This source contains some Macro definitions like 
#define REV  "Revision : 27". Surprisingly, when I check out the file, the 
revision number is getting modified to 1.1 from 27.

Has any body noticed similar problems. Pl. help me to find a solution to 
this problem.

Thanks in advance
--

Satya Prasad