Hi Josh, I was wondering whether you got any response to this problem. It is quite old, but I just encountered the same problem. If so, I would appreciate it, if you can help Thanks, Assa Assa Yeroslaviz Application service, Bioinformatics group Max Planck Institute for the Biology of Aging Robert-Koch-Str. 21 50931 Cologne Germany phone: +49 221 47889793 e-mail: AYeroslaviz at age.mpg.de