[BioC] Problem about using "goProfiles"

[wei tie]

Hi,

Has someone ever used package "goProfiles" to compare four or more
lists of genes?
I can use "mergeProfilesLists" function to construct the dataframe
containing the GOProfiles of four lists of genes, but the "profNames="
argument fails to function when the gene lists merged are more than 2.
Moreover, it is impossible to plot four profiles together using
"plotProfiles". There are always two bars for a category.

Does anyone know what is the problem? Or  "goProfiles" can not be used
 for more than two lists of genes?

Thanks a lot.

Weiwei