plot(pam.object) error with R-1.7.0 on Red-Hat 8.0 i686

Frome here 
http://www.nature.com/nature/journal/v406/n6795/extref/406536ai3.xls 
I copied cells  from 2F to  8069AQ (only values and string, no formatting) 
of 
CUTANEOUSMELANOMA sheet to a new
file with excell97 on winXP than I saved it as melanoma.csv (as comma 
separeted 
value). Now I'll try to set verbose level option to the maximum to look 
something.
Thanke more!
A.S.

----------------------------

Alessandro Semeria 
Models and Simulations Laboratory
The Environment Research Center - Montecatini (Edison Group), 
Via Ciro Menotti 48,
48023 Marina di Ravenna (RA), Italy
Tel. +39 544 536811
Fax. +39 544 538663
E-mail: asemeria at cramont.it