NBU Master is 7.6 and NBU client is 6.5

hi,

we have a new nbu master server with 7.6 version.

most of our clients is on Solaris 10 11/06 and HPUX 11.23 iA64 and SuSE9 which are not supported.

Currently, this clients has nbu 6.5.4 ver installed on it.

Question is can we perform backup given that master is 7.6 and client is on 6.5?

Thanks in advance.