R disapears strangely

When I use menu to open script, R disapears strangely. On average, It
happens every 2-3 operations of opening script. But actually, R is
still running in the backgroud, I can see the process in the task
manage window of windows XP.

Anyone comes across this problem?

R.version

_
platform       i386-pc-mingw32
arch           i386
os             mingw32
system         i386, mingw32
status         Patched
major          2
minor          5.0
year           2007
month          04
day            28
svn rev        41376
language       R
version.string R version 2.5.0 Patched (2007-04-28 r41376)

Ronggui Huang
Department of Sociology
Fudan University, Shanghai, China