The install problem of the MS6.0

When I install the MS6.0 in the cluster,with the following command ,the system show the waring as follows:

but for the MS5.5 or newer ,this command works ?

what should this command be uesd ?

Any suggestions????!!!

[wangl213@sugon MaterialsStudio60]\$ ./install --type cluster

Unknown option: type

Performing per-user installation of Materials Studio 6.0. Restart this

installation as root if you wish to perform an RPM-based installation.