I tried to use BioSeqClass function predictPFAM()

# Protein Pfam domain prediction

predictPFAM(seq, hmmpfam.path, pfam.path, Evalue=10^-5)

I downloaded hmmer and Pfam-A.hmm and included their paths in function. But every time i try to use protein sequence in any format I get

" 'x' must be an XStringSet object " error.

I use my sequence in AAStringset clas which is regular class under XStringSet family.

Any suggestions?

Thanks very much!