In-Place Upgrade from 5.0 to 5.1

Just received the Symantec 9.0 upgrade that requires Netware to be at version 5.1 sp 3.

As far as I can tell, our server is running version 5.0

Is there any way to upgrade to version 5.1 or do I need to purchase the latest (6.5) to update our system??

I am concerned – that maybe our server isn’t hefty enough to handle that upgrade and would therefore require purchasing a new systems.

Couldn’t find any answers on the Novell website – or by surfing the web. Any suggestions would be appreciated.