Rcmd check problem

I have the following message error when I try to buid my package :

C:\Documents and Settings\Philippe>Rcmd check mypackage
* checking for working latex ...Error: environment variable 
TMPDIR not 
set  (or set to unusable value) and no default available.
 at C:\PROGRA~1\R\rw1071\share\perl/R/Utils.pm line 165

Hello Philippe,

just a guess...have you included your miktex-path as an environmental
variable in your path (see:START -> Settings -> Control Panel -> System
Properties -> Advanced -> Environment Variables) and a tempdir likewise? 

HTH,
Bernhard

Does someone have any idea ?

Thanks

OS Windows XP
miktex
R 1.7.1
ActivePerle 5.8.0

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