[BioC] Cel file error

[Jason Hipp]

I was wondering if you could please help me with the following error I keep getting:
 
Error in read.affybatch(filenames = filenames, phenoData = phenoData,  : 
        The file C:/Userdata/Desktop/AAA001-U133A.CEL does not look like a CEL file
 
Thanks,
Jason