java warning opening nios in SOPC 9.0

Hi,

I've just upgraded to Quartus II 9.0 service pack 2. I have a nios in my system and because I am having problems with partitions I decided to try and rebuild the nios.

The nios was built using SOPC 8.0

When I double click on the nios. SOPC opens and I get a lot of warnings telling me things are upgrading but then I get an error!

Error: Unexpected error reading the ensemble: java.lang.NoClassDefFoundError: altera/ipbu/launcher/IPToolbenchController

Please can anyone help me

Thanks

Dave