R help - May 2004 - Problems with package foreign

In using read.spss I get:

Error in read.spss("Chu_cambios2.sav", to.data.frame = TRUE) : 
        Error reading system-file header.
In addition: Warning message: 
Chu_cambios2.sav: File layout code has unexpected value 50331648.  
Value should be 2, in big-endian or little-endian format.
> 
This file was written with spss version 10.0.7, 
and this is on windows XP.

Kjetil Halvorsen