sql server 2000

A)
many times I met many same error info when i try to setup sql edition
dotnetnuke on pc of c4 cpu.
Today,i re-install sql server 2000,during the process,i choosed
1)use local system account.
Now,i can use dotnetnuke 3.0.8 today.

B)

DotNetNuke Upgrade Error

The Assembly Version ( [ASSEMBLYVERSION] ) does not match the Database Version ( [DATABASEVERSION] )

ERROR: Could not connect to database specified in connectionString for SqlDataProvider