[R] error open .RData

[Muhammad Subianto]

Dear R-list,
I have a problem to open my R workspace.
When I try to open my file .Rdata with double-clik on windows explore I 
get the error like this:

Error in load(name, envir = .GlobalEnv) : error reading from connection

and on windows error:

Fatal error: unable to restore saved data in .RData

I try with,

 > load("CaseStudyHouseID50.RData", .GlobalEnv)
Error in load("CaseStudyHouseID50.RData", .GlobalEnv) :
         error reading from connection
 >

 > load("CaseStudyHouseID50.RData")
Error in load("CaseStudyHouseID50.RData") :
         error reading from connection
 >

I have done to save my R workspace like this:
################################################################################
   save(list = ls(all=TRUE),
        file = "CaseStudyHouseID50.RData")
################################################################################

What is wrong?
Is there anyway to open .RData?

Regards, Muhammad Subianto

 > R.version
          _
platform i386-pc-mingw32
arch     i386
os       mingw32
system   i386, mingw32
status
major    2
minor    2.0
year     2005
month    10
day      06
svn rev  35749
language R
 >