[BioC] problems attaching affy library

[Mahlet Tadesse]

I have installed the Bionconductor package in my directory and am 
attaching the libraries in my R session.  I have not had this problem 
before, but now I get the following message for the affy package (all the 
other packages get attached without problem):

> library(affy, lib.loc='/user/mtadesse/R_Packages')
image is already generic, could be a problem.
Error in mlistMetaName(f) : No way to associate a generic function with an 
object of class "NULL"
Error in library(affy, lib.loc = "/user/mtadesse/R_Packages") :
        .First.lib failed


Thank you for your help.
Mahlet